partially merge web branch into master
authorgregor herrmann <gregoa@debian.org>
Sun, 5 Aug 2018 18:57:51 +0000 (20:57 +0200)
committergregor herrmann <gregoa@debian.org>
Sun, 5 Aug 2018 18:57:51 +0000 (20:57 +0200)
this merges everything except the webapp in the web/ directory

i.e.
- .gitignore update
- seewasser.py: small fix
- add owm.py
- add seeparklib

web/README [deleted file]
web/seepark_web.py [deleted file]
web/static/c3.css [deleted file]
web/static/c3.js [deleted file]
web/static/c3.min.css [deleted file]
web/static/c3.min.js [deleted file]
web/static/d3.js [deleted file]
web/static/d3.min.js [deleted file]
web/static/seepark_web.css [deleted file]
web/static/seepark_web.js [deleted file]
web/templates/seepark_web.html [deleted file]

diff --git a/web/README b/web/README
deleted file mode 100644 (file)
index e377dbd..0000000
+++ /dev/null
@@ -1,14 +0,0 @@
-Needed packages: (python3-flask python3-sqlalchemy) python3-mysqldb python3-flask-sqlalchemy
-
-Start with:
-FLASK_APP=seepark_web.py FLASK_DEBUG=1 SEEPARKINI=~/seewasser.ini flask run
-
-Option:
--h 0.0.0.0
-at the end to listen on all interfaces, i.e.
-FLASK_APP=seepark_web.py FLASK_DEBUG=1 SEEPARKINI=~/seewasser.ini flask run -h 0.0.0.0
-
-Go to:
-http://127.0.0.1:5000/
-or http://<ipaddress>:5000/
-if the app is running on a different machine
diff --git a/web/seepark_web.py b/web/seepark_web.py
deleted file mode 100644 (file)
index 523e52d..0000000
+++ /dev/null
@@ -1,253 +0,0 @@
-import datetime
-import time
-import configparser
-import os
-import sys
-from collections import defaultdict
-from flask import Flask, render_template, jsonify, request, abort, Response
-import flask.json
-from flask_sqlalchemy import SQLAlchemy, inspect
-
-
-app_path = os.path.dirname(os.path.realpath(__file__))
-lib_path = os.path.join(app_path, '..')
-sys.path.append(lib_path)
-from seeparklib.openweathermap import openweathermap_json, OpenWeatherMapError
-
-
-# https://stackoverflow.com/a/37350445
-def sqlalchemy_model_to_dict(model):
-    return {c.key: getattr(model, c.key)
-        for c in inspect(model).mapper.column_attrs}
-
-
-class JSONEncoder(flask.json.JSONEncoder):
-    def default(self, object):
-        if isinstance(object, datetime.datetime):
-            return object.isoformat()
-        elif isinstance(object, db.Model):
-            return sqlalchemy_model_to_dict(object)
-        return super().default(object)
-
-
-def parse_datetime(date_str):
-    return datetime.datetime.strptime(date_str, '%Y-%m-%dT%H:%M:%S')
-
-
-def get_sqlalchemy_database_uri(config):
-    user = config.get('database', 'user')
-    pwd = config.get('database', 'password')
-    host = config.get('database', 'hostname')
-    db = config.get('database', 'database')
-    return 'mysql+mysqldb://{}:{}@{}/{}'.format(user, pwd, host, db)
-
-
-config = configparser.ConfigParser()
-config.read(os.environ['SEEPARKINI'])
-apikey = config.get('openweathermap', 'apikey')
-cityid = config.get('openweathermap', 'cityid')
-mainsensor = config.get('temperature', 'mainsensor')
-
-app = Flask(__name__)
-app.json_encoder = JSONEncoder
-app.config['SQLALCHEMY_DATABASE_URI'] = get_sqlalchemy_database_uri(config)
-app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
-db = SQLAlchemy(app)
-db.reflect(app=app)
-
-
-class Sensors(db.Model):
-    __tablename__ = 'sensors'
-
-
-class OpenWeatherMap(db.Model):
-    __tablename__ = 'openweathermap'
-
-
-def select_sensordata(sensor_id, sensor_type, begin, end, mode):
-    query = Sensors.query
-    if sensor_id is not None:
-        query = query.filter(Sensors.sensor_id == sensor_id)
-    if sensor_type is not None:
-        query = query.filter(Sensors.value_type == sensor_type)
-    if begin is not None:
-        query = query.filter(Sensors.timestamp >= begin)
-    if end is not None:
-        query = query.filter(Sensors.timestamp <= end)
-    if mode == 'consolidated' and begin is not None and end is not None:
-        # copied from munin/master/_bin/munin-cgi-graph.in
-        # interval in seconds for data points
-        resolutions = dict(
-            day   =   300,
-            week  =  1800,
-            month =  7200,
-            year  = 86400,
-        )
-        duration = (end - begin).total_seconds()
-        day = 60 * 60 * 24
-        if duration <= day:
-            resolution = resolutions['day']
-        elif duration <= 7 * day:
-            resolution = resolutions['week']
-        elif duration <= 31 * day:
-            resolution = resolutions['month']
-        else:
-            resolution = resolutions['year']
-        # TODO: filter out samples from 'result'
-        # something like 
-        # select to_seconds(datetime) DIV (60*60*24) as interval_id, min(datetime), max(datetime), min(temp), avg(temp), max(temp), count(temp) from openweathermap group by interval_id order by interval_id;
-    return query.all()
-
-
-def select_openweatherdata(cityid, begin, end, mode):
-    query = OpenWeatherMap.query.filter(OpenWeatherMap.cityid == cityid)
-    if begin is not None:
-        query = query.filter(OpenWeatherMap.datetime >= begin)
-    if end is not None:
-        query = query.filter(OpenWeatherMap.datetime <= end)
-    if mode == 'consolidated' and begin is not None and end is not None:
-        # copied from munin/master/_bin/munin-cgi-graph.in
-        # interval in seconds for data points
-        resolutions = dict(
-            day   =   300,
-            week  =  1800,
-            month =  7200,
-            year  = 86400,
-        )
-        duration = (end - begin).total_seconds()
-        day = 60 * 60 * 24
-        if duration < day:
-            resolution = resolutions['day']
-        elif duration < 7 * day:
-            resolution = resolutions['week']
-        elif duration < 31 * day:
-            resolution = resolutions['month']
-        else:
-            resolution = resolutions['year']
-        # TODO: filter out samples from 'result'
-        # something like 
-        # select to_seconds(datetime) DIV (60*60*24) as interval_id, min(datetime), max(datetime), min(temp), avg(temp), max(temp), count(temp) from openweathermap group by interval_id order by interval_id;
-    return query.all()
-
-
-def convert_to_c3(result, id, field_x, field_y):
-    c3result = defaultdict(list)
-    for row in result:
-        c3result[getattr(row, id)].append(getattr(row, field_y))
-        dt = getattr(row, field_x).strftime('%Y-%m-%d %H:%M:%S')
-        c3result[str(getattr(row, id)) + '_x'].append(dt)
-    return c3result
-
-
-def request_arg(key, type, default=None):
-    """Returns the key from the request if available, otherwise the default value.
-    In case type is provided and the key is present, the value is converted by calling type.
-    In other words: Reimplement request.args.get but don't return default value if
-    type raises a ValueError."""
-    if key in request.args:
-        try:
-            return type(request.args[key])
-        except ValueError as e:
-            abort(Response(str(e), 400))
-    else:
-        return default
-
-
-def sensordata(sensor_id=None, sensor_type=None):
-    begin = request_arg('begin', parse_datetime)
-    end = request_arg('end', parse_datetime)
-    mode = request.args.get('mode', 'full')
-    format = request.args.get('format', 'default')
-
-    result = select_sensordata(sensor_id, sensor_type, begin, end, mode)
-
-    if format == 'c3':
-        return convert_to_c3(result, 'sensor_id', 'timestamp', 'value')
-    return result
-
-
-def openweathermapdata(cityid):
-    begin = request_arg('begin', parse_datetime)
-    end = request_arg('end', parse_datetime)
-    mode = request.args.get('mode', 'full')
-    format = request.args.get('format', 'default')
-
-    result = select_openweatherdata(cityid, begin, end, mode)
-
-    if format == 'c3':
-        return convert_to_c3(result, 'cityid', 'datetime', 'temp')
-    return result
-
-
-def currentairtemperature(cityid):
-    result = OpenWeatherMap.query.filter_by(cityid=cityid).order_by(OpenWeatherMap.datetime.desc()).first()
-    return result.temp, result.datetime
-
-
-def currentwatertemperature(sensorid):
-    result = Sensors.query.filter_by(sensor_id=sensorid).order_by(Sensors.timestamp.desc()).first()
-    return result.value, result.timestamp
-
-
-@app.route('/api/<version>/sensors/')
-def sensors(version):
-    """List all sensors found in the database"""
-    result = db.session.query(Sensors.sensor_id, Sensors.sensor_name, Sensors.value_type).distinct().all()
-    return jsonify(result)
-
-
-@app.route('/api/<version>/sensor/id/<sensor_id>')
-def sensorid(version, sensor_id):
-    """Return all data for a specific sensor
-
-    URL parameters:
-    begin=<datetime>, optional, format like "2018-05-19T21:07:53"
-    end=<datetime>, optional, format like "2018-05-19T21:07:53"
-    mode=<full|consolidated>, optional. return all rows (default) or with lower resolution (for charts)
-    format=<default|c3>, optional. return result as returned by sqlalchemy (default) or formatted for c3.js
-    """
-    result = sensordata(sensor_id=sensor_id)
-    return jsonify(result)
-
-
-@app.route('/api/<version>/sensor/type/<sensor_type>')
-def sensortype(version, sensor_type):
-    """Return all data for a specific sensor type
-
-    URL parameters:
-    begin=<datetime>, optional, format like "2018-05-19T21:07:53"
-    end=<datetime>, optional, format like "2018-05-19T21:07:53"
-    mode=<full|consolidated>, optional. return all rows (default) or with lower resolution (for charts)
-    format=<default|c3>, optional. return result as returned by sqlalchemy (default) or formatted for c3.js
-    """
-    result = sensordata(sensor_type=sensor_type)
-    return jsonify(result)
-
-
-@app.route('/api/<version>/openweathermap/cities')
-def openweathermap_cities(version):
-    """List all city IDs found in the database"""
-    result = db.session.query(OpenWeatherMap.cityid).distinct().all()
-    return jsonify(result)
-
-
-@app.route('/api/<version>/openweathermap/city/<cityid>')
-def openweathermap_city(version, cityid):
-    """List all data found for a city"""
-    result = openweathermapdata(cityid=cityid)
-    return jsonify(result)
-
-
-@app.route("/")
-def index():
-    airvalue, airtime     = currentairtemperature(cityid)
-    watervalue, watertime = currentwatertemperature(mainsensor)
-
-    return render_template(
-        'seepark_web.html',
-        apikey=apikey,
-        watervalue=watervalue,
-        watertime=watertime,
-        airvalue=airvalue,
-        airtime=airtime,
-    )
diff --git a/web/static/c3.css b/web/static/c3.css
deleted file mode 100644 (file)
index cb1ae32..0000000
+++ /dev/null
@@ -1,178 +0,0 @@
-/*-- Chart --*/
-.c3 svg {
-  font: 10px sans-serif;
-  -webkit-tap-highlight-color: transparent; }
-
-.c3 path, .c3 line {
-  fill: none;
-  stroke: #000; }
-
-.c3 text {
-  -webkit-user-select: none;
-  -moz-user-select: none;
-  user-select: none; }
-
-.c3-legend-item-tile,
-.c3-xgrid-focus,
-.c3-ygrid,
-.c3-event-rect,
-.c3-bars path {
-  shape-rendering: crispEdges; }
-
-.c3-chart-arc path {
-  stroke: #fff; }
-
-.c3-chart-arc rect {
-  stroke: white;
-  stroke-width: 1; }
-
-.c3-chart-arc text {
-  fill: #fff;
-  font-size: 13px; }
-
-/*-- Axis --*/
-/*-- Grid --*/
-.c3-grid line {
-  stroke: #aaa; }
-
-.c3-grid text {
-  fill: #aaa; }
-
-.c3-xgrid, .c3-ygrid {
-  stroke-dasharray: 3 3; }
-
-/*-- Text on Chart --*/
-.c3-text.c3-empty {
-  fill: #808080;
-  font-size: 2em; }
-
-/*-- Line --*/
-.c3-line {
-  stroke-width: 1px; }
-
-/*-- Point --*/
-.c3-circle._expanded_ {
-  stroke-width: 1px;
-  stroke: white; }
-
-.c3-selected-circle {
-  fill: white;
-  stroke-width: 2px; }
-
-/*-- Bar --*/
-.c3-bar {
-  stroke-width: 0; }
-
-.c3-bar._expanded_ {
-  fill-opacity: 1;
-  fill-opacity: 0.75; }
-
-/*-- Focus --*/
-.c3-target.c3-focused {
-  opacity: 1; }
-
-.c3-target.c3-focused path.c3-line, .c3-target.c3-focused path.c3-step {
-  stroke-width: 2px; }
-
-.c3-target.c3-defocused {
-  opacity: 0.3 !important; }
-
-/*-- Region --*/
-.c3-region {
-  fill: steelblue;
-  fill-opacity: .1; }
-
-/*-- Brush --*/
-.c3-brush .extent {
-  fill-opacity: .1; }
-
-/*-- Select - Drag --*/
-/*-- Legend --*/
-.c3-legend-item {
-  font-size: 12px; }
-
-.c3-legend-item-hidden {
-  opacity: 0.15; }
-
-.c3-legend-background {
-  opacity: 0.75;
-  fill: white;
-  stroke: lightgray;
-  stroke-width: 1; }
-
-/*-- Title --*/
-.c3-title {
-  font: 14px sans-serif; }
-
-/*-- Tooltip --*/
-.c3-tooltip-container {
-  z-index: 10; }
-
-.c3-tooltip {
-  border-collapse: collapse;
-  border-spacing: 0;
-  background-color: #fff;
-  empty-cells: show;
-  -webkit-box-shadow: 7px 7px 12px -9px #777777;
-  -moz-box-shadow: 7px 7px 12px -9px #777777;
-  box-shadow: 7px 7px 12px -9px #777777;
-  opacity: 0.9; }
-
-.c3-tooltip tr {
-  border: 1px solid #CCC; }
-
-.c3-tooltip th {
-  background-color: #aaa;
-  font-size: 14px;
-  padding: 2px 5px;
-  text-align: left;
-  color: #FFF; }
-
-.c3-tooltip td {
-  font-size: 13px;
-  padding: 3px 6px;
-  background-color: #fff;
-  border-left: 1px dotted #999; }
-
-.c3-tooltip td > span {
-  display: inline-block;
-  width: 10px;
-  height: 10px;
-  margin-right: 6px; }
-
-.c3-tooltip td.value {
-  text-align: right; }
-
-/*-- Area --*/
-.c3-area {
-  stroke-width: 0;
-  opacity: 0.2; }
-
-/*-- Arc --*/
-.c3-chart-arcs-title {
-  dominant-baseline: middle;
-  font-size: 1.3em; }
-
-.c3-chart-arcs .c3-chart-arcs-background {
-  fill: #e0e0e0;
-  stroke: #FFF; }
-
-.c3-chart-arcs .c3-chart-arcs-gauge-unit {
-  fill: #000;
-  font-size: 16px; }
-
-.c3-chart-arcs .c3-chart-arcs-gauge-max {
-  fill: #777; }
-
-.c3-chart-arcs .c3-chart-arcs-gauge-min {
-  fill: #777; }
-
-.c3-chart-arc .c3-gauge-value {
-  fill: #000;
-  /*  font-size: 28px !important;*/ }
-
-.c3-chart-arc.c3-target g path {
-  opacity: 1; }
-
-.c3-chart-arc.c3-target.c3-focused g path {
-  opacity: 1; }
diff --git a/web/static/c3.js b/web/static/c3.js
deleted file mode 100644 (file)
index ff42e0f..0000000
+++ /dev/null
@@ -1,9206 +0,0 @@
-/* @license C3.js v0.6.1 | (c) C3 Team and other contributors | http://c3js.org/ */
-(function (global, factory) {
-    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
-    typeof define === 'function' && define.amd ? define(factory) :
-    (global.c3 = factory());
-}(this, (function () { 'use strict';
-
-    var CLASS = {
-        target: 'c3-target',
-        chart: 'c3-chart',
-        chartLine: 'c3-chart-line',
-        chartLines: 'c3-chart-lines',
-        chartBar: 'c3-chart-bar',
-        chartBars: 'c3-chart-bars',
-        chartText: 'c3-chart-text',
-        chartTexts: 'c3-chart-texts',
-        chartArc: 'c3-chart-arc',
-        chartArcs: 'c3-chart-arcs',
-        chartArcsTitle: 'c3-chart-arcs-title',
-        chartArcsBackground: 'c3-chart-arcs-background',
-        chartArcsGaugeUnit: 'c3-chart-arcs-gauge-unit',
-        chartArcsGaugeMax: 'c3-chart-arcs-gauge-max',
-        chartArcsGaugeMin: 'c3-chart-arcs-gauge-min',
-        selectedCircle: 'c3-selected-circle',
-        selectedCircles: 'c3-selected-circles',
-        eventRect: 'c3-event-rect',
-        eventRects: 'c3-event-rects',
-        eventRectsSingle: 'c3-event-rects-single',
-        eventRectsMultiple: 'c3-event-rects-multiple',
-        zoomRect: 'c3-zoom-rect',
-        brush: 'c3-brush',
-        focused: 'c3-focused',
-        defocused: 'c3-defocused',
-        region: 'c3-region',
-        regions: 'c3-regions',
-        title: 'c3-title',
-        tooltipContainer: 'c3-tooltip-container',
-        tooltip: 'c3-tooltip',
-        tooltipName: 'c3-tooltip-name',
-        shape: 'c3-shape',
-        shapes: 'c3-shapes',
-        line: 'c3-line',
-        lines: 'c3-lines',
-        bar: 'c3-bar',
-        bars: 'c3-bars',
-        circle: 'c3-circle',
-        circles: 'c3-circles',
-        arc: 'c3-arc',
-        arcLabelLine: 'c3-arc-label-line',
-        arcs: 'c3-arcs',
-        area: 'c3-area',
-        areas: 'c3-areas',
-        empty: 'c3-empty',
-        text: 'c3-text',
-        texts: 'c3-texts',
-        gaugeValue: 'c3-gauge-value',
-        grid: 'c3-grid',
-        gridLines: 'c3-grid-lines',
-        xgrid: 'c3-xgrid',
-        xgrids: 'c3-xgrids',
-        xgridLine: 'c3-xgrid-line',
-        xgridLines: 'c3-xgrid-lines',
-        xgridFocus: 'c3-xgrid-focus',
-        ygrid: 'c3-ygrid',
-        ygrids: 'c3-ygrids',
-        ygridLine: 'c3-ygrid-line',
-        ygridLines: 'c3-ygrid-lines',
-        axis: 'c3-axis',
-        axisX: 'c3-axis-x',
-        axisXLabel: 'c3-axis-x-label',
-        axisY: 'c3-axis-y',
-        axisYLabel: 'c3-axis-y-label',
-        axisY2: 'c3-axis-y2',
-        axisY2Label: 'c3-axis-y2-label',
-        legendBackground: 'c3-legend-background',
-        legendItem: 'c3-legend-item',
-        legendItemEvent: 'c3-legend-item-event',
-        legendItemTile: 'c3-legend-item-tile',
-        legendItemHidden: 'c3-legend-item-hidden',
-        legendItemFocused: 'c3-legend-item-focused',
-        dragarea: 'c3-dragarea',
-        EXPANDED: '_expanded_',
-        SELECTED: '_selected_',
-        INCLUDED: '_included_'
-    };
-
-    var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
-      return typeof obj;
-    } : function (obj) {
-      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
-    };
-
-    var classCallCheck = function (instance, Constructor) {
-      if (!(instance instanceof Constructor)) {
-        throw new TypeError("Cannot call a class as a function");
-      }
-    };
-
-    var defineProperty = function (obj, key, value) {
-      if (key in obj) {
-        Object.defineProperty(obj, key, {
-          value: value,
-          enumerable: true,
-          configurable: true,
-          writable: true
-        });
-      } else {
-        obj[key] = value;
-      }
-
-      return obj;
-    };
-
-    var inherits = function (subClass, superClass) {
-      if (typeof superClass !== "function" && superClass !== null) {
-        throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
-      }
-
-      subClass.prototype = Object.create(superClass && superClass.prototype, {
-        constructor: {
-          value: subClass,
-          enumerable: false,
-          writable: true,
-          configurable: true
-        }
-      });
-      if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
-    };
-
-    var possibleConstructorReturn = function (self, call) {
-      if (!self) {
-        throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
-      }
-
-      return call && (typeof call === "object" || typeof call === "function") ? call : self;
-    };
-
-    var isValue = function isValue(v) {
-        return v || v === 0;
-    };
-    var isFunction = function isFunction(o) {
-        return typeof o === 'function';
-    };
-    var isArray = function isArray(o) {
-        return Array.isArray(o);
-    };
-    var isString = function isString(o) {
-        return typeof o === 'string';
-    };
-    var isUndefined = function isUndefined(v) {
-        return typeof v === 'undefined';
-    };
-    var isDefined = function isDefined(v) {
-        return typeof v !== 'undefined';
-    };
-    var ceil10 = function ceil10(v) {
-        return Math.ceil(v / 10) * 10;
-    };
-    var asHalfPixel = function asHalfPixel(n) {
-        return Math.ceil(n) + 0.5;
-    };
-    var diffDomain = function diffDomain(d) {
-        return d[1] - d[0];
-    };
-    var isEmpty = function isEmpty(o) {
-        return typeof o === 'undefined' || o === null || isString(o) && o.length === 0 || (typeof o === 'undefined' ? 'undefined' : _typeof(o)) === 'object' && Object.keys(o).length === 0;
-    };
-    var notEmpty = function notEmpty(o) {
-        return !c3_chart_internal_fn.isEmpty(o);
-    };
-    var getOption = function getOption(options, key, defaultValue) {
-        return isDefined(options[key]) ? options[key] : defaultValue;
-    };
-    var hasValue = function hasValue(dict, value) {
-        var found = false;
-        Object.keys(dict).forEach(function (key) {
-            if (dict[key] === value) {
-                found = true;
-            }
-        });
-        return found;
-    };
-    var sanitise = function sanitise(str) {
-        return typeof str === 'string' ? str.replace(/</g, '&lt;').replace(/>/g, '&gt;') : str;
-    };
-    var getPathBox = function getPathBox(path) {
-        var box = path.getBoundingClientRect(),
-            items = [path.pathSegList.getItem(0), path.pathSegList.getItem(1)],
-            minX = items[0].x,
-            minY = Math.min(items[0].y, items[1].y);
-        return { x: minX, y: minY, width: box.width, height: box.height };
-    };
-
-    var c3_axis_fn;
-    var c3_axis_internal_fn;
-
-    function AxisInternal(component, params) {
-        var internal = this;
-        internal.component = component;
-        internal.params = params || {};
-
-        internal.d3 = component.d3;
-        internal.scale = internal.d3.scaleLinear();
-        internal.range;
-        internal.orient = "bottom";
-        internal.innerTickSize = 6;
-        internal.outerTickSize = this.params.withOuterTick ? 6 : 0;
-        internal.tickPadding = 3;
-        internal.tickValues = null;
-        internal.tickFormat;
-        internal.tickArguments;
-
-        internal.tickOffset = 0;
-        internal.tickCulling = true;
-        internal.tickCentered;
-        internal.tickTextCharSize;
-        internal.tickTextRotate = internal.params.tickTextRotate;
-        internal.tickLength;
-
-        internal.axis = internal.generateAxis();
-    }
-    c3_axis_internal_fn = AxisInternal.prototype;
-
-    c3_axis_internal_fn.axisX = function (selection, x, tickOffset) {
-        selection.attr("transform", function (d) {
-            return "translate(" + Math.ceil(x(d) + tickOffset) + ", 0)";
-        });
-    };
-    c3_axis_internal_fn.axisY = function (selection, y) {
-        selection.attr("transform", function (d) {
-            return "translate(0," + Math.ceil(y(d)) + ")";
-        });
-    };
-    c3_axis_internal_fn.scaleExtent = function (domain) {
-        var start = domain[0],
-            stop = domain[domain.length - 1];
-        return start < stop ? [start, stop] : [stop, start];
-    };
-    c3_axis_internal_fn.generateTicks = function (scale) {
-        var internal = this;
-        var i,
-            domain,
-            ticks = [];
-        if (scale.ticks) {
-            return scale.ticks.apply(scale, internal.tickArguments);
-        }
-        domain = scale.domain();
-        for (i = Math.ceil(domain[0]); i < domain[1]; i++) {
-            ticks.push(i);
-        }
-        if (ticks.length > 0 && ticks[0] > 0) {
-            ticks.unshift(ticks[0] - (ticks[1] - ticks[0]));
-        }
-        return ticks;
-    };
-    c3_axis_internal_fn.copyScale = function () {
-        var internal = this;
-        var newScale = internal.scale.copy(),
-            domain;
-        if (internal.params.isCategory) {
-            domain = internal.scale.domain();
-            newScale.domain([domain[0], domain[1] - 1]);
-        }
-        return newScale;
-    };
-    c3_axis_internal_fn.textFormatted = function (v) {
-        var internal = this,
-            formatted = internal.tickFormat ? internal.tickFormat(v) : v;
-        return typeof formatted !== 'undefined' ? formatted : '';
-    };
-    c3_axis_internal_fn.updateRange = function () {
-        var internal = this;
-        internal.range = internal.scale.rangeExtent ? internal.scale.rangeExtent() : internal.scaleExtent(internal.scale.range());
-        return internal.range;
-    };
-    c3_axis_internal_fn.updateTickTextCharSize = function (tick) {
-        var internal = this;
-        if (internal.tickTextCharSize) {
-            return internal.tickTextCharSize;
-        }
-        var size = {
-            h: 11.5,
-            w: 5.5
-        };
-        tick.select('text').text(function (d) {
-            return internal.textFormatted(d);
-        }).each(function (d) {
-            var box = this.getBoundingClientRect(),
-                text = internal.textFormatted(d),
-                h = box.height,
-                w = text ? box.width / text.length : undefined;
-            if (h && w) {
-                size.h = h;
-                size.w = w;
-            }
-        }).text('');
-        internal.tickTextCharSize = size;
-        return size;
-    };
-    c3_axis_internal_fn.isVertical = function () {
-        return this.orient === 'left' || this.orient === 'right';
-    };
-    c3_axis_internal_fn.tspanData = function (d, i, scale) {
-        var internal = this;
-        var splitted = internal.params.tickMultiline ? internal.splitTickText(d, scale) : [].concat(internal.textFormatted(d));
-
-        if (internal.params.tickMultiline && internal.params.tickMultilineMax > 0) {
-            splitted = internal.ellipsify(splitted, internal.params.tickMultilineMax);
-        }
-
-        return splitted.map(function (s) {
-            return { index: i, splitted: s, length: splitted.length };
-        });
-    };
-    c3_axis_internal_fn.splitTickText = function (d, scale) {
-        var internal = this,
-            tickText = internal.textFormatted(d),
-            maxWidth = internal.params.tickWidth,
-            subtext,
-            spaceIndex,
-            textWidth,
-            splitted = [];
-
-        if (Object.prototype.toString.call(tickText) === "[object Array]") {
-            return tickText;
-        }
-
-        if (!maxWidth || maxWidth <= 0) {
-            maxWidth = internal.isVertical() ? 95 : internal.params.isCategory ? Math.ceil(scale(1) - scale(0)) - 12 : 110;
-        }
-
-        function split(splitted, text) {
-            spaceIndex = undefined;
-            for (var i = 1; i < text.length; i++) {
-                if (text.charAt(i) === ' ') {
-                    spaceIndex = i;
-                }
-                subtext = text.substr(0, i + 1);
-                textWidth = internal.tickTextCharSize.w * subtext.length;
-                // if text width gets over tick width, split by space index or crrent index
-                if (maxWidth < textWidth) {
-                    return split(splitted.concat(text.substr(0, spaceIndex ? spaceIndex : i)), text.slice(spaceIndex ? spaceIndex + 1 : i));
-                }
-            }
-            return splitted.concat(text);
-        }
-
-        return split(splitted, tickText + "");
-    };
-    c3_axis_internal_fn.ellipsify = function (splitted, max) {
-        if (splitted.length <= max) {
-            return splitted;
-        }
-
-        var ellipsified = splitted.slice(0, max);
-        var remaining = 3;
-        for (var i = max - 1; i >= 0; i--) {
-            var available = ellipsified[i].length;
-
-            ellipsified[i] = ellipsified[i].substr(0, available - remaining).padEnd(available, '.');
-
-            remaining -= available;
-
-            if (remaining <= 0) {
-                break;
-            }
-        }
-
-        return ellipsified;
-    };
-    c3_axis_internal_fn.updateTickLength = function () {
-        var internal = this;
-        internal.tickLength = Math.max(internal.innerTickSize, 0) + internal.tickPadding;
-    };
-    c3_axis_internal_fn.lineY2 = function (d) {
-        var internal = this,
-            tickPosition = internal.scale(d) + (internal.tickCentered ? 0 : internal.tickOffset);
-        return internal.range[0] < tickPosition && tickPosition < internal.range[1] ? internal.innerTickSize : 0;
-    };
-    c3_axis_internal_fn.textY = function () {
-        var internal = this,
-            rotate = internal.tickTextRotate;
-        return rotate ? 11.5 - 2.5 * (rotate / 15) * (rotate > 0 ? 1 : -1) : internal.tickLength;
-    };
-    c3_axis_internal_fn.textTransform = function () {
-        var internal = this,
-            rotate = internal.tickTextRotate;
-        return rotate ? "rotate(" + rotate + ")" : "";
-    };
-    c3_axis_internal_fn.textTextAnchor = function () {
-        var internal = this,
-            rotate = internal.tickTextRotate;
-        return rotate ? rotate > 0 ? "start" : "end" : "middle";
-    };
-    c3_axis_internal_fn.tspanDx = function () {
-        var internal = this,
-            rotate = internal.tickTextRotate;
-        return rotate ? 8 * Math.sin(Math.PI * (rotate / 180)) : 0;
-    };
-    c3_axis_internal_fn.tspanDy = function (d, i) {
-        var internal = this,
-            dy = internal.tickTextCharSize.h;
-        if (i === 0) {
-            if (internal.isVertical()) {
-                dy = -((d.length - 1) * (internal.tickTextCharSize.h / 2) - 3);
-            } else {
-                dy = ".71em";
-            }
-        }
-        return dy;
-    };
-
-    c3_axis_internal_fn.generateAxis = function () {
-        var internal = this,
-            d3 = internal.d3,
-            params = internal.params;
-        function axis(g, transition) {
-            var self;
-            g.each(function () {
-                var g = axis.g = d3.select(this);
-
-                var scale0 = this.__chart__ || internal.scale,
-                    scale1 = this.__chart__ = internal.copyScale();
-
-                var ticksValues = internal.tickValues ? internal.tickValues : internal.generateTicks(scale1),
-                    ticks = g.selectAll(".tick").data(ticksValues, scale1),
-                    tickEnter = ticks.enter().insert("g", ".domain").attr("class", "tick").style("opacity", 1e-6),
-
-                // MEMO: No exit transition. The reason is this transition affects max tick width calculation because old tick will be included in the ticks.
-                tickExit = ticks.exit().remove(),
-                    tickUpdate = ticks.merge(tickEnter),
-                    tickTransform,
-                    tickX,
-                    tickY;
-
-                if (params.isCategory) {
-                    internal.tickOffset = Math.ceil((scale1(1) - scale1(0)) / 2);
-                    tickX = internal.tickCentered ? 0 : internal.tickOffset;
-                    tickY = internal.tickCentered ? internal.tickOffset : 0;
-                } else {
-                    internal.tickOffset = tickX = 0;
-                }
-
-                internal.updateRange();
-                internal.updateTickLength();
-                internal.updateTickTextCharSize(g.select('.tick'));
-
-                var lineUpdate = tickUpdate.select("line").merge(tickEnter.append("line")),
-                    textUpdate = tickUpdate.select("text").merge(tickEnter.append("text"));
-
-                var tspans = tickUpdate.selectAll('text').selectAll('tspan').data(function (d, i) {
-                    return internal.tspanData(d, i, scale1);
-                }),
-                    tspanEnter = tspans.enter().append('tspan'),
-                    tspanUpdate = tspanEnter.merge(tspans).text(function (d) {
-                    return d.splitted;
-                });
-                tspans.exit().remove();
-
-                var path = g.selectAll(".domain").data([0]),
-                    pathUpdate = path.enter().append("path").merge(path).attr("class", "domain");
-
-                // TODO: each attr should be one function and change its behavior by internal.orient, probably
-                switch (internal.orient) {
-                    case "bottom":
-                        {
-                            tickTransform = internal.axisX;
-                            lineUpdate.attr("x1", tickX).attr("x2", tickX).attr("y2", function (d, i) {
-                                return internal.lineY2(d, i);
-                            });
-                            textUpdate.attr("x", 0).attr("y", function (d, i) {
-                                return internal.textY(d, i);
-                            }).attr("transform", function (d, i) {
-                                return internal.textTransform(d, i);
-                            }).style("text-anchor", function (d, i) {
-                                return internal.textTextAnchor(d, i);
-                            });
-                            tspanUpdate.attr('x', 0).attr("dy", function (d, i) {
-                                return internal.tspanDy(d, i);
-                            }).attr('dx', function (d, i) {
-                                return internal.tspanDx(d, i);
-                            });
-                            pathUpdate.attr("d", "M" + internal.range[0] + "," + internal.outerTickSize + "V0H" + internal.range[1] + "V" + internal.outerTickSize);
-                            break;
-                        }
-                    case "top":
-                        {
-                            // TODO: rotated tick text
-                            tickTransform = internal.axisX;
-                            lineUpdate.attr("x1", tickX).attr("x2", tickX).attr("y2", function (d, i) {
-                                return -1 * internal.lineY2(d, i);
-                            });
-                            textUpdate.attr("x", 0).attr("y", function (d, i) {
-                                return -1 * internal.textY(d, i) - (params.isCategory ? 2 : internal.tickLength - 2);
-                            }).attr("transform", function (d, i) {
-                                return internal.textTransform(d, i);
-                            }).style("text-anchor", function (d, i) {
-                                return internal.textTextAnchor(d, i);
-                            });
-                            tspanUpdate.attr('x', 0).attr("dy", function (d, i) {
-                                return internal.tspanDy(d, i);
-                            }).attr('dx', function (d, i) {
-                                return internal.tspanDx(d, i);
-                            });
-                            pathUpdate.attr("d", "M" + internal.range[0] + "," + -internal.outerTickSize + "V0H" + internal.range[1] + "V" + -internal.outerTickSize);
-                            break;
-                        }
-                    case "left":
-                        {
-                            tickTransform = internal.axisY;
-                            lineUpdate.attr("x2", -internal.innerTickSize).attr("y1", tickY).attr("y2", tickY);
-                            textUpdate.attr("x", -internal.tickLength).attr("y", internal.tickOffset).style("text-anchor", "end");
-                            tspanUpdate.attr('x', -internal.tickLength).attr("dy", function (d, i) {
-                                return internal.tspanDy(d, i);
-                            });
-                            pathUpdate.attr("d", "M" + -internal.outerTickSize + "," + internal.range[0] + "H0V" + internal.range[1] + "H" + -internal.outerTickSize);
-                            break;
-                        }
-                    case "right":
-                        {
-                            tickTransform = internal.axisY;
-                            lineUpdate.attr("x2", internal.innerTickSize).attr("y1", tickY).attr("y2", tickY);
-                            textUpdate.attr("x", internal.tickLength).attr("y", internal.tickOffset).style("text-anchor", "start");
-                            tspanUpdate.attr('x', internal.tickLength).attr("dy", function (d, i) {
-                                return internal.tspanDy(d, i);
-                            });
-                            pathUpdate.attr("d", "M" + internal.outerTickSize + "," + internal.range[0] + "H0V" + internal.range[1] + "H" + internal.outerTickSize);
-                            break;
-                        }
-                }
-                if (scale1.rangeBand) {
-                    var x = scale1,
-                        dx = x.rangeBand() / 2;
-                    scale0 = scale1 = function scale1(d) {
-                        return x(d) + dx;
-                    };
-                } else if (scale0.rangeBand) {
-                    scale0 = scale1;
-                } else {
-                    tickExit.call(tickTransform, scale1, internal.tickOffset);
-                }
-                tickEnter.call(tickTransform, scale0, internal.tickOffset);
-                self = (transition ? tickUpdate.transition(transition) : tickUpdate).style('opacity', 1).call(tickTransform, scale1, internal.tickOffset);
-            });
-            return self;
-        }
-        axis.scale = function (x) {
-            if (!arguments.length) {
-                return internal.scale;
-            }
-            internal.scale = x;
-            return axis;
-        };
-        axis.orient = function (x) {
-            if (!arguments.length) {
-                return internal.orient;
-            }
-            internal.orient = x in { top: 1, right: 1, bottom: 1, left: 1 } ? x + "" : "bottom";
-            return axis;
-        };
-        axis.tickFormat = function (format) {
-            if (!arguments.length) {
-                return internal.tickFormat;
-            }
-            internal.tickFormat = format;
-            return axis;
-        };
-        axis.tickCentered = function (isCentered) {
-            if (!arguments.length) {
-                return internal.tickCentered;
-            }
-            internal.tickCentered = isCentered;
-            return axis;
-        };
-        axis.tickOffset = function () {
-            return internal.tickOffset;
-        };
-        axis.tickInterval = function () {
-            var interval, length;
-            if (params.isCategory) {
-                interval = internal.tickOffset * 2;
-            } else {
-                length = axis.g.select('path.domain').node().getTotalLength() - internal.outerTickSize * 2;
-                interval = length / axis.g.selectAll('line').size();
-            }
-            return interval === Infinity ? 0 : interval;
-        };
-        axis.ticks = function () {
-            if (!arguments.length) {
-                return internal.tickArguments;
-            }
-            internal.tickArguments = arguments;
-            return axis;
-        };
-        axis.tickCulling = function (culling) {
-            if (!arguments.length) {
-                return internal.tickCulling;
-            }
-            internal.tickCulling = culling;
-            return axis;
-        };
-        axis.tickValues = function (x) {
-            if (typeof x === 'function') {
-                internal.tickValues = function () {
-                    return x(internal.scale.domain());
-                };
-            } else {
-                if (!arguments.length) {
-                    return internal.tickValues;
-                }
-                internal.tickValues = x;
-            }
-            return axis;
-        };
-        return axis;
-    };
-
-    var Axis = function (_Component) {
-        inherits(Axis, _Component);
-
-        function Axis(owner) {
-            classCallCheck(this, Axis);
-
-            var fn = {
-                fn: c3_axis_fn,
-                internal: {
-                    fn: c3_axis_internal_fn
-                }
-            };
-
-            var _this = possibleConstructorReturn(this, (Axis.__proto__ || Object.getPrototypeOf(Axis)).call(this, owner, 'axis', fn));
-
-            _this.d3 = owner.d3;
-            _this.internal = AxisInternal;
-            return _this;
-        }
-
-        return Axis;
-    }(Component);
-
-    c3_axis_fn = Axis.prototype;
-
-    c3_axis_fn.init = function init() {
-        var $$ = this.owner,
-            config = $$.config,
-            main = $$.main;
-        $$.axes.x = main.append("g").attr("class", CLASS.axis + ' ' + CLASS.axisX).attr("clip-path", config.axis_x_inner ? "" : $$.clipPathForXAxis).attr("transform", $$.getTranslate('x')).style("visibility", config.axis_x_show ? 'visible' : 'hidden');
-        $$.axes.x.append("text").attr("class", CLASS.axisXLabel).attr("transform", config.axis_rotated ? "rotate(-90)" : "").style("text-anchor", this.textAnchorForXAxisLabel.bind(this));
-        $$.axes.y = main.append("g").attr("class", CLASS.axis + ' ' + CLASS.axisY).attr("clip-path", config.axis_y_inner ? "" : $$.clipPathForYAxis).attr("transform", $$.getTranslate('y')).style("visibility", config.axis_y_show ? 'visible' : 'hidden');
-        $$.axes.y.append("text").attr("class", CLASS.axisYLabel).attr("transform", config.axis_rotated ? "" : "rotate(-90)").style("text-anchor", this.textAnchorForYAxisLabel.bind(this));
-
-        $$.axes.y2 = main.append("g").attr("class", CLASS.axis + ' ' + CLASS.axisY2)
-        // clip-path?
-        .attr("transform", $$.getTranslate('y2')).style("visibility", config.axis_y2_show ? 'visible' : 'hidden');
-        $$.axes.y2.append("text").attr("class", CLASS.axisY2Label).attr("transform", config.axis_rotated ? "" : "rotate(-90)").style("text-anchor", this.textAnchorForY2AxisLabel.bind(this));
-    };
-    c3_axis_fn.getXAxis = function getXAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition, withoutRotateTickText) {
-        var $$ = this.owner,
-            config = $$.config,
-            axisParams = {
-            isCategory: $$.isCategorized(),
-            withOuterTick: withOuterTick,
-            tickMultiline: config.axis_x_tick_multiline,
-            tickMultilineMax: config.axis_x_tick_multiline ? Number(config.axis_x_tick_multilineMax) : 0,
-            tickWidth: config.axis_x_tick_width,
-            tickTextRotate: withoutRotateTickText ? 0 : config.axis_x_tick_rotate,
-            withoutTransition: withoutTransition
-        },
-            axis = new this.internal(this, axisParams).axis.scale(scale).orient(orient);
-
-        if ($$.isTimeSeries() && tickValues && typeof tickValues !== "function") {
-            tickValues = tickValues.map(function (v) {
-                return $$.parseDate(v);
-            });
-        }
-
-        // Set tick
-        axis.tickFormat(tickFormat).tickValues(tickValues);
-        if ($$.isCategorized()) {
-            axis.tickCentered(config.axis_x_tick_centered);
-            if (isEmpty(config.axis_x_tick_culling)) {
-                config.axis_x_tick_culling = false;
-            }
-        }
-
-        return axis;
-    };
-    c3_axis_fn.updateXAxisTickValues = function updateXAxisTickValues(targets, axis) {
-        var $$ = this.owner,
-            config = $$.config,
-            tickValues;
-        if (config.axis_x_tick_fit || config.axis_x_tick_count) {
-            tickValues = this.generateTickValues($$.mapTargetsToUniqueXs(targets), config.axis_x_tick_count, $$.isTimeSeries());
-        }
-        if (axis) {
-            axis.tickValues(tickValues);
-        } else {
-            $$.xAxis.tickValues(tickValues);
-            $$.subXAxis.tickValues(tickValues);
-        }
-        return tickValues;
-    };
-    c3_axis_fn.getYAxis = function getYAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition, withoutRotateTickText) {
-        var $$ = this.owner,
-            config = $$.config,
-            axisParams = {
-            withOuterTick: withOuterTick,
-            withoutTransition: withoutTransition,
-            tickTextRotate: withoutRotateTickText ? 0 : config.axis_y_tick_rotate
-        },
-            axis = new this.internal(this, axisParams).axis.scale(scale).orient(orient).tickFormat(tickFormat);
-        if ($$.isTimeSeriesY()) {
-            axis.ticks(config.axis_y_tick_time_type, config.axis_y_tick_time_interval);
-        } else {
-            axis.tickValues(tickValues);
-        }
-        return axis;
-    };
-    c3_axis_fn.getId = function getId(id) {
-        var config = this.owner.config;
-        return id in config.data_axes ? config.data_axes[id] : 'y';
-    };
-    c3_axis_fn.getXAxisTickFormat = function getXAxisTickFormat() {
-        // #2251 previously set any negative values to a whole number,
-        // however both should be truncated according to the users format specification
-        var $$ = this.owner,
-            config = $$.config;
-        var format = $$.isTimeSeries() ? $$.defaultAxisTimeFormat : $$.isCategorized() ? $$.categoryName : function (v) {
-            return v;
-        };
-
-        if (config.axis_x_tick_format) {
-            if (isFunction(config.axis_x_tick_format)) {
-                format = config.axis_x_tick_format;
-            } else if ($$.isTimeSeries()) {
-                format = function format(date) {
-                    return date ? $$.axisTimeFormat(config.axis_x_tick_format)(date) : "";
-                };
-            }
-        }
-        return isFunction(format) ? function (v) {
-            return format.call($$, v);
-        } : format;
-    };
-    c3_axis_fn.getTickValues = function getTickValues(tickValues, axis) {
-        return tickValues ? tickValues : axis ? axis.tickValues() : undefined;
-    };
-    c3_axis_fn.getXAxisTickValues = function getXAxisTickValues() {
-        return this.getTickValues(this.owner.config.axis_x_tick_values, this.owner.xAxis);
-    };
-    c3_axis_fn.getYAxisTickValues = function getYAxisTickValues() {
-        return this.getTickValues(this.owner.config.axis_y_tick_values, this.owner.yAxis);
-    };
-    c3_axis_fn.getY2AxisTickValues = function getY2AxisTickValues() {
-        return this.getTickValues(this.owner.config.axis_y2_tick_values, this.owner.y2Axis);
-    };
-    c3_axis_fn.getLabelOptionByAxisId = function getLabelOptionByAxisId(axisId) {
-        var $$ = this.owner,
-            config = $$.config,
-            option;
-        if (axisId === 'y') {
-            option = config.axis_y_label;
-        } else if (axisId === 'y2') {
-            option = config.axis_y2_label;
-        } else if (axisId === 'x') {
-            option = config.axis_x_label;
-        }
-        return option;
-    };
-    c3_axis_fn.getLabelText = function getLabelText(axisId) {
-        var option = this.getLabelOptionByAxisId(axisId);
-        return isString(option) ? option : option ? option.text : null;
-    };
-    c3_axis_fn.setLabelText = function setLabelText(axisId, text) {
-        var $$ = this.owner,
-            config = $$.config,
-            option = this.getLabelOptionByAxisId(axisId);
-        if (isString(option)) {
-            if (axisId === 'y') {
-                config.axis_y_label = text;
-            } else if (axisId === 'y2') {
-                config.axis_y2_label = text;
-            } else if (axisId === 'x') {
-                config.axis_x_label = text;
-            }
-        } else if (option) {
-            option.text = text;
-        }
-    };
-    c3_axis_fn.getLabelPosition = function getLabelPosition(axisId, defaultPosition) {
-        var option = this.getLabelOptionByAxisId(axisId),
-            position = option && (typeof option === 'undefined' ? 'undefined' : _typeof(option)) === 'object' && option.position ? option.position : defaultPosition;
-        return {
-            isInner: position.indexOf('inner') >= 0,
-            isOuter: position.indexOf('outer') >= 0,
-            isLeft: position.indexOf('left') >= 0,
-            isCenter: position.indexOf('center') >= 0,
-            isRight: position.indexOf('right') >= 0,
-            isTop: position.indexOf('top') >= 0,
-            isMiddle: position.indexOf('middle') >= 0,
-            isBottom: position.indexOf('bottom') >= 0
-        };
-    };
-    c3_axis_fn.getXAxisLabelPosition = function getXAxisLabelPosition() {
-        return this.getLabelPosition('x', this.owner.config.axis_rotated ? 'inner-top' : 'inner-right');
-    };
-    c3_axis_fn.getYAxisLabelPosition = function getYAxisLabelPosition() {
-        return this.getLabelPosition('y', this.owner.config.axis_rotated ? 'inner-right' : 'inner-top');
-    };
-    c3_axis_fn.getY2AxisLabelPosition = function getY2AxisLabelPosition() {
-        return this.getLabelPosition('y2', this.owner.config.axis_rotated ? 'inner-right' : 'inner-top');
-    };
-    c3_axis_fn.getLabelPositionById = function getLabelPositionById(id) {
-        return id === 'y2' ? this.getY2AxisLabelPosition() : id === 'y' ? this.getYAxisLabelPosition() : this.getXAxisLabelPosition();
-    };
-    c3_axis_fn.textForXAxisLabel = function textForXAxisLabel() {
-        return this.getLabelText('x');
-    };
-    c3_axis_fn.textForYAxisLabel = function textForYAxisLabel() {
-        return this.getLabelText('y');
-    };
-    c3_axis_fn.textForY2AxisLabel = function textForY2AxisLabel() {
-        return this.getLabelText('y2');
-    };
-    c3_axis_fn.xForAxisLabel = function xForAxisLabel(forHorizontal, position) {
-        var $$ = this.owner;
-        if (forHorizontal) {
-            return position.isLeft ? 0 : position.isCenter ? $$.width / 2 : $$.width;
-        } else {
-            return position.isBottom ? -$$.height : position.isMiddle ? -$$.height / 2 : 0;
-        }
-    };
-    c3_axis_fn.dxForAxisLabel = function dxForAxisLabel(forHorizontal, position) {
-        if (forHorizontal) {
-            return position.isLeft ? "0.5em" : position.isRight ? "-0.5em" : "0";
-        } else {
-            return position.isTop ? "-0.5em" : position.isBottom ? "0.5em" : "0";
-        }
-    };
-    c3_axis_fn.textAnchorForAxisLabel = function textAnchorForAxisLabel(forHorizontal, position) {
-        if (forHorizontal) {
-            return position.isLeft ? 'start' : position.isCenter ? 'middle' : 'end';
-        } else {
-            return position.isBottom ? 'start' : position.isMiddle ? 'middle' : 'end';
-        }
-    };
-    c3_axis_fn.xForXAxisLabel = function xForXAxisLabel() {
-        return this.xForAxisLabel(!this.owner.config.axis_rotated, this.getXAxisLabelPosition());
-    };
-    c3_axis_fn.xForYAxisLabel = function xForYAxisLabel() {
-        return this.xForAxisLabel(this.owner.config.axis_rotated, this.getYAxisLabelPosition());
-    };
-    c3_axis_fn.xForY2AxisLabel = function xForY2AxisLabel() {
-        return this.xForAxisLabel(this.owner.config.axis_rotated, this.getY2AxisLabelPosition());
-    };
-    c3_axis_fn.dxForXAxisLabel = function dxForXAxisLabel() {
-        return this.dxForAxisLabel(!this.owner.config.axis_rotated, this.getXAxisLabelPosition());
-    };
-    c3_axis_fn.dxForYAxisLabel = function dxForYAxisLabel() {
-        return this.dxForAxisLabel(this.owner.config.axis_rotated, this.getYAxisLabelPosition());
-    };
-    c3_axis_fn.dxForY2AxisLabel = function dxForY2AxisLabel() {
-        return this.dxForAxisLabel(this.owner.config.axis_rotated, this.getY2AxisLabelPosition());
-    };
-    c3_axis_fn.dyForXAxisLabel = function dyForXAxisLabel() {
-        var $$ = this.owner,
-            config = $$.config,
-            position = this.getXAxisLabelPosition();
-        if (config.axis_rotated) {
-            return position.isInner ? "1.2em" : -25 - ($$.config.axis_x_inner ? 0 : this.getMaxTickWidth('x'));
-        } else {
-            return position.isInner ? "-0.5em" : config.axis_x_height ? config.axis_x_height - 10 : "3em";
-        }
-    };
-    c3_axis_fn.dyForYAxisLabel = function dyForYAxisLabel() {
-        var $$ = this.owner,
-            position = this.getYAxisLabelPosition();
-        if ($$.config.axis_rotated) {
-            return position.isInner ? "-0.5em" : "3em";
-        } else {
-            return position.isInner ? "1.2em" : -10 - ($$.config.axis_y_inner ? 0 : this.getMaxTickWidth('y') + 10);
-        }
-    };
-    c3_axis_fn.dyForY2AxisLabel = function dyForY2AxisLabel() {
-        var $$ = this.owner,
-            position = this.getY2AxisLabelPosition();
-        if ($$.config.axis_rotated) {
-            return position.isInner ? "1.2em" : "-2.2em";
-        } else {
-            return position.isInner ? "-0.5em" : 15 + ($$.config.axis_y2_inner ? 0 : this.getMaxTickWidth('y2') + 15);
-        }
-    };
-    c3_axis_fn.textAnchorForXAxisLabel = function textAnchorForXAxisLabel() {
-        var $$ = this.owner;
-        return this.textAnchorForAxisLabel(!$$.config.axis_rotated, this.getXAxisLabelPosition());
-    };
-    c3_axis_fn.textAnchorForYAxisLabel = function textAnchorForYAxisLabel() {
-        var $$ = this.owner;
-        return this.textAnchorForAxisLabel($$.config.axis_rotated, this.getYAxisLabelPosition());
-    };
-    c3_axis_fn.textAnchorForY2AxisLabel = function textAnchorForY2AxisLabel() {
-        var $$ = this.owner;
-        return this.textAnchorForAxisLabel($$.config.axis_rotated, this.getY2AxisLabelPosition());
-    };
-    c3_axis_fn.getMaxTickWidth = function getMaxTickWidth(id, withoutRecompute) {
-        var $$ = this.owner,
-            config = $$.config,
-            maxWidth = 0,
-            targetsToShow,
-            scale,
-            axis,
-            dummy,
-            svg;
-        if (withoutRecompute && $$.currentMaxTickWidths[id]) {
-            return $$.currentMaxTickWidths[id];
-        }
-        if ($$.svg) {
-            targetsToShow = $$.filterTargetsToShow($$.data.targets);
-            if (id === 'y') {
-                scale = $$.y.copy().domain($$.getYDomain(targetsToShow, 'y'));
-                axis = this.getYAxis(scale, $$.yOrient, config.axis_y_tick_format, $$.yAxisTickValues, false, true, true);
-            } else if (id === 'y2') {
-                scale = $$.y2.copy().domain($$.getYDomain(targetsToShow, 'y2'));
-                axis = this.getYAxis(scale, $$.y2Orient, config.axis_y2_tick_format, $$.y2AxisTickValues, false, true, true);
-            } else {
-                scale = $$.x.copy().domain($$.getXDomain(targetsToShow));
-                axis = this.getXAxis(scale, $$.xOrient, $$.xAxisTickFormat, $$.xAxisTickValues, false, true, true);
-                this.updateXAxisTickValues(targetsToShow, axis);
-            }
-            dummy = $$.d3.select('body').append('div').classed('c3', true);
-            svg = dummy.append("svg").style('visibility', 'hidden').style('position', 'fixed').style('top', 0).style('left', 0), svg.append('g').call(axis).each(function () {
-                $$.d3.select(this).selectAll('text').each(function () {
-                    var box = this.getBoundingClientRect();
-                    if (maxWidth < box.width) {
-                        maxWidth = box.width;
-                    }
-                });
-                dummy.remove();
-            });
-        }
-        $$.currentMaxTickWidths[id] = maxWidth <= 0 ? $$.currentMaxTickWidths[id] : maxWidth;
-        return $$.currentMaxTickWidths[id];
-    };
-
-    c3_axis_fn.updateLabels = function updateLabels(withTransition) {
-        var $$ = this.owner;
-        var axisXLabel = $$.main.select('.' + CLASS.axisX + ' .' + CLASS.axisXLabel),
-            axisYLabel = $$.main.select('.' + CLASS.axisY + ' .' + CLASS.axisYLabel),
-            axisY2Label = $$.main.select('.' + CLASS.axisY2 + ' .' + CLASS.axisY2Label);
-        (withTransition ? axisXLabel.transition() : axisXLabel).attr("x", this.xForXAxisLabel.bind(this)).attr("dx", this.dxForXAxisLabel.bind(this)).attr("dy", this.dyForXAxisLabel.bind(this)).text(this.textForXAxisLabel.bind(this));
-        (withTransition ? axisYLabel.transition() : axisYLabel).attr("x", this.xForYAxisLabel.bind(this)).attr("dx", this.dxForYAxisLabel.bind(this)).attr("dy", this.dyForYAxisLabel.bind(this)).text(this.textForYAxisLabel.bind(this));
-        (withTransition ? axisY2Label.transition() : axisY2Label).attr("x", this.xForY2AxisLabel.bind(this)).attr("dx", this.dxForY2AxisLabel.bind(this)).attr("dy", this.dyForY2AxisLabel.bind(this)).text(this.textForY2AxisLabel.bind(this));
-    };
-    c3_axis_fn.getPadding = function getPadding(padding, key, defaultValue, domainLength) {
-        var p = typeof padding === 'number' ? padding : padding[key];
-        if (!isValue(p)) {
-            return defaultValue;
-        }
-        if (padding.unit === 'ratio') {
-            return padding[key] * domainLength;
-        }
-        // assume padding is pixels if unit is not specified
-        return this.convertPixelsToAxisPadding(p, domainLength);
-    };
-    c3_axis_fn.convertPixelsToAxisPadding = function convertPixelsToAxisPadding(pixels, domainLength) {
-        var $$ = this.owner,
-            length = $$.config.axis_rotated ? $$.width : $$.height;
-        return domainLength * (pixels / length);
-    };
-    c3_axis_fn.generateTickValues = function generateTickValues(values, tickCount, forTimeSeries) {
-        var tickValues = values,
-            targetCount,
-            start,
-            end,
-            count,
-            interval,
-            i,
-            tickValue;
-        if (tickCount) {
-            targetCount = isFunction(tickCount) ? tickCount() : tickCount;
-            // compute ticks according to tickCount
-            if (targetCount === 1) {
-                tickValues = [values[0]];
-            } else if (targetCount === 2) {
-                tickValues = [values[0], values[values.length - 1]];
-            } else if (targetCount > 2) {
-                count = targetCount - 2;
-                start = values[0];
-                end = values[values.length - 1];
-                interval = (end - start) / (count + 1);
-                // re-construct unique values
-                tickValues = [start];
-                for (i = 0; i < count; i++) {
-                    tickValue = +start + interval * (i + 1);
-                    tickValues.push(forTimeSeries ? new Date(tickValue) : tickValue);
-                }
-                tickValues.push(end);
-            }
-        }
-        if (!forTimeSeries) {
-            tickValues = tickValues.sort(function (a, b) {
-                return a - b;
-            });
-        }
-        return tickValues;
-    };
-    c3_axis_fn.generateTransitions = function generateTransitions(duration) {
-        var $$ = this.owner,
-            axes = $$.axes;
-        return {
-            axisX: duration ? axes.x.transition().duration(duration) : axes.x,
-            axisY: duration ? axes.y.transition().duration(duration) : axes.y,
-            axisY2: duration ? axes.y2.transition().duration(duration) : axes.y2,
-            axisSubX: duration ? axes.subx.transition().duration(duration) : axes.subx
-        };
-    };
-    c3_axis_fn.redraw = function redraw(duration, isHidden) {
-        var $$ = this.owner,
-            transition = duration ? $$.d3.transition().duration(duration) : null;
-        $$.axes.x.style("opacity", isHidden ? 0 : 1).call($$.xAxis, transition);
-        $$.axes.y.style("opacity", isHidden ? 0 : 1).call($$.yAxis, transition);
-        $$.axes.y2.style("opacity", isHidden ? 0 : 1).call($$.y2Axis, transition);
-        $$.axes.subx.style("opacity", isHidden ? 0 : 1).call($$.subXAxis, transition);
-    };
-
-    var c3 = { version: "0.6.1" };
-
-    var c3_chart_fn;
-    var c3_chart_internal_fn;
-
-    function Component(owner, componentKey, fn) {
-        this.owner = owner;
-        c3.chart.internal[componentKey] = fn;
-    }
-
-    function Chart(config) {
-        var $$ = this.internal = new ChartInternal(this);
-        $$.loadConfig(config);
-
-        $$.beforeInit(config);
-        $$.init();
-        $$.afterInit(config);
-
-        // bind "this" to nested API
-        (function bindThis(fn, target, argThis) {
-            Object.keys(fn).forEach(function (key) {
-                target[key] = fn[key].bind(argThis);
-                if (Object.keys(fn[key]).length > 0) {
-                    bindThis(fn[key], target[key], argThis);
-                }
-            });
-        })(c3_chart_fn, this, this);
-    }
-
-    function ChartInternal(api) {
-        var $$ = this;
-        $$.d3 = window.d3 ? window.d3 : typeof require !== 'undefined' ? require("d3") : undefined;
-        $$.api = api;
-        $$.config = $$.getDefaultConfig();
-        $$.data = {};
-        $$.cache = {};
-        $$.axes = {};
-    }
-
-    c3.generate = function (config) {
-        return new Chart(config);
-    };
-
-    c3.chart = {
-        fn: Chart.prototype,
-        internal: {
-            fn: ChartInternal.prototype
-        }
-    };
-    c3_chart_fn = c3.chart.fn;
-    c3_chart_internal_fn = c3.chart.internal.fn;
-
-    c3_chart_internal_fn.beforeInit = function () {
-        // can do something
-    };
-    c3_chart_internal_fn.afterInit = function () {
-        // can do something
-    };
-    c3_chart_internal_fn.init = function () {
-        var $$ = this,
-            config = $$.config;
-
-        $$.initParams();
-
-        if (config.data_url) {
-            $$.convertUrlToData(config.data_url, config.data_mimeType, config.data_headers, config.data_keys, $$.initWithData);
-        } else if (config.data_json) {
-            $$.initWithData($$.convertJsonToData(config.data_json, config.data_keys));
-        } else if (config.data_rows) {
-            $$.initWithData($$.convertRowsToData(config.data_rows));
-        } else if (config.data_columns) {
-            $$.initWithData($$.convertColumnsToData(config.data_columns));
-        } else {
-            throw Error('url or json or rows or columns is required.');
-        }
-    };
-
-    c3_chart_internal_fn.initParams = function () {
-        var $$ = this,
-            d3 = $$.d3,
-            config = $$.config;
-
-        // MEMO: clipId needs to be unique because it conflicts when multiple charts exist
-        $$.clipId = "c3-" + +new Date() + '-clip', $$.clipIdForXAxis = $$.clipId + '-xaxis', $$.clipIdForYAxis = $$.clipId + '-yaxis', $$.clipIdForGrid = $$.clipId + '-grid', $$.clipIdForSubchart = $$.clipId + '-subchart', $$.clipPath = $$.getClipPath($$.clipId), $$.clipPathForXAxis = $$.getClipPath($$.clipIdForXAxis), $$.clipPathForYAxis = $$.getClipPath($$.clipIdForYAxis);
-        $$.clipPathForGrid = $$.getClipPath($$.clipIdForGrid), $$.clipPathForSubchart = $$.getClipPath($$.clipIdForSubchart), $$.dragStart = null;
-        $$.dragging = false;
-        $$.flowing = false;
-        $$.cancelClick = false;
-        $$.mouseover = false;
-        $$.transiting = false;
-
-        $$.color = $$.generateColor();
-        $$.levelColor = $$.generateLevelColor();
-
-        $$.dataTimeParse = (config.data_xLocaltime ? d3.timeParse : d3.utcParse)($$.config.data_xFormat);
-        $$.axisTimeFormat = config.axis_x_localtime ? d3.timeFormat : d3.utcFormat;
-        $$.defaultAxisTimeFormat = function (date) {
-            if (date.getMilliseconds()) {
-                return d3.timeFormat(".%L")(date);
-            }
-            if (date.getSeconds()) {
-                return d3.timeFormat(":%S")(date);
-            }
-            if (date.getMinutes()) {
-                return d3.timeFormat("%I:%M")(date);
-            }
-            if (date.getHours()) {
-                return d3.timeFormat("%I %p")(date);
-            }
-            if (date.getDay() && date.getDate() !== 1) {
-                return d3.timeFormat("%-m/%-d")(date);
-            }
-            if (date.getDate() !== 1) {
-                return d3.timeFormat("%-m/%-d")(date);
-            }
-            if (date.getMonth()) {
-                return d3.timeFormat("%-m/%-d")(date);
-            }
-            return d3.timeFormat("%Y/%-m/%-d")(date);
-        };
-        $$.hiddenTargetIds = [];
-        $$.hiddenLegendIds = [];
-        $$.focusedTargetIds = [];
-        $$.defocusedTargetIds = [];
-
-        $$.xOrient = config.axis_rotated ? config.axis_x_inner ? "right" : "left" : config.axis_x_inner ? "top" : "bottom";
-        $$.yOrient = config.axis_rotated ? config.axis_y_inner ? "top" : "bottom" : config.axis_y_inner ? "right" : "left";
-        $$.y2Orient = config.axis_rotated ? config.axis_y2_inner ? "bottom" : "top" : config.axis_y2_inner ? "left" : "right";
-        $$.subXOrient = config.axis_rotated ? "left" : "bottom";
-
-        $$.isLegendRight = config.legend_position === 'right';
-        $$.isLegendInset = config.legend_position === 'inset';
-        $$.isLegendTop = config.legend_inset_anchor === 'top-left' || config.legend_inset_anchor === 'top-right';
-        $$.isLegendLeft = config.legend_inset_anchor === 'top-left' || config.legend_inset_anchor === 'bottom-left';
-        $$.legendStep = 0;
-        $$.legendItemWidth = 0;
-        $$.legendItemHeight = 0;
-
-        $$.currentMaxTickWidths = {
-            x: 0,
-            y: 0,
-            y2: 0
-        };
-
-        $$.rotated_padding_left = 30;
-        $$.rotated_padding_right = config.axis_rotated && !config.axis_x_show ? 0 : 30;
-        $$.rotated_padding_top = 5;
-
-        $$.withoutFadeIn = {};
-
-        $$.intervalForObserveInserted = undefined;
-
-        $$.axes.subx = d3.selectAll([]); // needs when excluding subchart.js
-    };
-
-    c3_chart_internal_fn.initChartElements = function () {
-        if (this.initBar) {
-            this.initBar();
-        }
-        if (this.initLine) {
-            this.initLine();
-        }
-        if (this.initArc) {
-            this.initArc();
-        }
-        if (this.initGauge) {
-            this.initGauge();
-        }
-        if (this.initText) {
-            this.initText();
-        }
-    };
-
-    c3_chart_internal_fn.initWithData = function (data) {
-        var $$ = this,
-            d3 = $$.d3,
-            config = $$.config;
-        var defs,
-            main,
-            binding = true;
-
-        $$.axis = new Axis($$);
-
-        if (!config.bindto) {
-            $$.selectChart = d3.selectAll([]);
-        } else if (typeof config.bindto.node === 'function') {
-            $$.selectChart = config.bindto;
-        } else {
-            $$.selectChart = d3.select(config.bindto);
-        }
-        if ($$.selectChart.empty()) {
-            $$.selectChart = d3.select(document.createElement('div')).style('opacity', 0);
-            $$.observeInserted($$.selectChart);
-            binding = false;
-        }
-        $$.selectChart.html("").classed("c3", true);
-
-        // Init data as targets
-        $$.data.xs = {};
-        $$.data.targets = $$.convertDataToTargets(data);
-
-        if (config.data_filter) {
-            $$.data.targets = $$.data.targets.filter(config.data_filter);
-        }
-
-        // Set targets to hide if needed
-        if (config.data_hide) {
-            $$.addHiddenTargetIds(config.data_hide === true ? $$.mapToIds($$.data.targets) : config.data_hide);
-        }
-        if (config.legend_hide) {
-            $$.addHiddenLegendIds(config.legend_hide === true ? $$.mapToIds($$.data.targets) : config.legend_hide);
-        }
-
-        // Init sizes and scales
-        $$.updateSizes();
-        $$.updateScales();
-
-        // Set domains for each scale
-        $$.x.domain(d3.extent($$.getXDomain($$.data.targets)));
-        $$.y.domain($$.getYDomain($$.data.targets, 'y'));
-        $$.y2.domain($$.getYDomain($$.data.targets, 'y2'));
-        $$.subX.domain($$.x.domain());
-        $$.subY.domain($$.y.domain());
-        $$.subY2.domain($$.y2.domain());
-
-        // Save original x domain for zoom update
-        $$.orgXDomain = $$.x.domain();
-
-        /*-- Basic Elements --*/
-
-        // Define svgs
-        $$.svg = $$.selectChart.append("svg").style("overflow", "hidden").on('mouseenter', function () {
-            return config.onmouseover.call($$);
-        }).on('mouseleave', function () {
-            return config.onmouseout.call($$);
-        });
-
-        if ($$.config.svg_classname) {
-            $$.svg.attr('class', $$.config.svg_classname);
-        }
-
-        // Define defs
-        defs = $$.svg.append("defs");
-        $$.clipChart = $$.appendClip(defs, $$.clipId);
-        $$.clipXAxis = $$.appendClip(defs, $$.clipIdForXAxis);
-        $$.clipYAxis = $$.appendClip(defs, $$.clipIdForYAxis);
-        $$.clipGrid = $$.appendClip(defs, $$.clipIdForGrid);
-        $$.clipSubchart = $$.appendClip(defs, $$.clipIdForSubchart);
-        $$.updateSvgSize();
-
-        // Define regions
-        main = $$.main = $$.svg.append("g").attr("transform", $$.getTranslate('main'));
-
-        if ($$.initPie) {
-            $$.initPie();
-        }
-        if ($$.initSubchart) {
-            $$.initSubchart();
-        }
-        if ($$.initTooltip) {
-            $$.initTooltip();
-        }
-        if ($$.initLegend) {
-            $$.initLegend();
-        }
-        if ($$.initTitle) {
-            $$.initTitle();
-        }
-        if ($$.initZoom) {
-            $$.initZoom();
-        }
-
-        // Update selection based on size and scale
-        // TODO: currently this must be called after initLegend because of update of sizes, but it should be done in initSubchart.
-        if ($$.initSubchartBrush) {
-            $$.initSubchartBrush();
-        }
-
-        /*-- Main Region --*/
-
-        // text when empty
-        main.append("text").attr("class", CLASS.text + ' ' + CLASS.empty).attr("text-anchor", "middle") // horizontal centering of text at x position in all browsers.
-        .attr("dominant-baseline", "middle"); // vertical centering of text at y position in all browsers, except IE.
-
-        // Regions
-        $$.initRegion();
-
-        // Grids
-        $$.initGrid();
-
-        // Define g for chart area
-        main.append('g').attr("clip-path", $$.clipPath).attr('class', CLASS.chart);
-
-        // Grid lines
-        if (config.grid_lines_front) {
-            $$.initGridLines();
-        }
-
-        // Define g for chart
-        $$.initChartElements();
-
-        // Add Axis
-        $$.axis.init();
-
-        // Set targets
-        $$.updateTargets($$.data.targets);
-
-        // Cover whole with rects for events
-        $$.initEventRect();
-
-        // Set default extent if defined
-        if (config.axis_x_selection) {
-            $$.brush.selectionAsValue($$.getDefaultSelection());
-        }
-
-        // Draw with targets
-        if (binding) {
-            $$.updateDimension();
-            $$.config.oninit.call($$);
-            $$.redraw({
-                withTransition: false,
-                withTransform: true,
-                withUpdateXDomain: true,
-                withUpdateOrgXDomain: true,
-                withTransitionForAxis: false
-            });
-        }
-
-        // Bind resize event
-        $$.bindResize();
-
-        // export element of the chart
-        $$.api.element = $$.selectChart.node();
-    };
-
-    c3_chart_internal_fn.smoothLines = function (el, type) {
-        var $$ = this;
-        if (type === 'grid') {
-            el.each(function () {
-                var g = $$.d3.select(this),
-                    x1 = g.attr('x1'),
-                    x2 = g.attr('x2'),
-                    y1 = g.attr('y1'),
-                    y2 = g.attr('y2');
-                g.attr({
-                    'x1': Math.ceil(x1),
-                    'x2': Math.ceil(x2),
-                    'y1': Math.ceil(y1),
-                    'y2': Math.ceil(y2)
-                });
-            });
-        }
-    };
-
-    c3_chart_internal_fn.updateSizes = function () {
-        var $$ = this,
-            config = $$.config;
-        var legendHeight = $$.legend ? $$.getLegendHeight() : 0,
-            legendWidth = $$.legend ? $$.getLegendWidth() : 0,
-            legendHeightForBottom = $$.isLegendRight || $$.isLegendInset ? 0 : legendHeight,
-            hasArc = $$.hasArcType(),
-            xAxisHeight = config.axis_rotated || hasArc ? 0 : $$.getHorizontalAxisHeight('x'),
-            subchartHeight = config.subchart_show && !hasArc ? config.subchart_size_height + xAxisHeight : 0;
-
-        $$.currentWidth = $$.getCurrentWidth();
-        $$.currentHeight = $$.getCurrentHeight();
-
-        // for main
-        $$.margin = config.axis_rotated ? {
-            top: $$.getHorizontalAxisHeight('y2') + $$.getCurrentPaddingTop(),
-            right: hasArc ? 0 : $$.getCurrentPaddingRight(),
-            bottom: $$.getHorizontalAxisHeight('y') + legendHeightForBottom + $$.getCurrentPaddingBottom(),
-            left: subchartHeight + (hasArc ? 0 : $$.getCurrentPaddingLeft())
-        } : {
-            top: 4 + $$.getCurrentPaddingTop(), // for top tick text
-            right: hasArc ? 0 : $$.getCurrentPaddingRight(),
-            bottom: xAxisHeight + subchartHeight + legendHeightForBottom + $$.getCurrentPaddingBottom(),
-            left: hasArc ? 0 : $$.getCurrentPaddingLeft()
-        };
-
-        // for subchart
-        $$.margin2 = config.axis_rotated ? {
-            top: $$.margin.top,
-            right: NaN,
-            bottom: 20 + legendHeightForBottom,
-            left: $$.rotated_padding_left
-        } : {
-            top: $$.currentHeight - subchartHeight - legendHeightForBottom,
-            right: NaN,
-            bottom: xAxisHeight + legendHeightForBottom,
-            left: $$.margin.left
-        };
-
-        // for legend
-        $$.margin3 = {
-            top: 0,
-            right: NaN,
-            bottom: 0,
-            left: 0
-        };
-        if ($$.updateSizeForLegend) {
-            $$.updateSizeForLegend(legendHeight, legendWidth);
-        }
-
-        $$.width = $$.currentWidth - $$.margin.left - $$.margin.right;
-        $$.height = $$.currentHeight - $$.margin.top - $$.margin.bottom;
-        if ($$.width < 0) {
-            $$.width = 0;
-        }
-        if ($$.height < 0) {
-            $$.height = 0;
-        }
-
-        $$.width2 = config.axis_rotated ? $$.margin.left - $$.rotated_padding_left - $$.rotated_padding_right : $$.width;
-        $$.height2 = config.axis_rotated ? $$.height : $$.currentHeight - $$.margin2.top - $$.margin2.bottom;
-        if ($$.width2 < 0) {
-            $$.width2 = 0;
-        }
-        if ($$.height2 < 0) {
-            $$.height2 = 0;
-        }
-
-        // for arc
-        $$.arcWidth = $$.width - ($$.isLegendRight ? legendWidth + 10 : 0);
-        $$.arcHeight = $$.height - ($$.isLegendRight ? 0 : 10);
-        if ($$.hasType('gauge') && !config.gauge_fullCircle) {
-            $$.arcHeight += $$.height - $$.getGaugeLabelHeight();
-        }
-        if ($$.updateRadius) {
-            $$.updateRadius();
-        }
-
-        if ($$.isLegendRight && hasArc) {
-            $$.margin3.left = $$.arcWidth / 2 + $$.radiusExpanded * 1.1;
-        }
-    };
-
-    c3_chart_internal_fn.updateTargets = function (targets) {
-        var $$ = this;
-
-        /*-- Main --*/
-
-        //-- Text --//
-        $$.updateTargetsForText(targets);
-
-        //-- Bar --//
-        $$.updateTargetsForBar(targets);
-
-        //-- Line --//
-        $$.updateTargetsForLine(targets);
-
-        //-- Arc --//
-        if ($$.hasArcType() && $$.updateTargetsForArc) {
-            $$.updateTargetsForArc(targets);
-        }
-
-        /*-- Sub --*/
-
-        if ($$.updateTargetsForSubchart) {
-            $$.updateTargetsForSubchart(targets);
-        }
-
-        // Fade-in each chart
-        $$.showTargets();
-    };
-    c3_chart_internal_fn.showTargets = function () {
-        var $$ = this;
-        $$.svg.selectAll('.' + CLASS.target).filter(function (d) {
-            return $$.isTargetToShow(d.id);
-        }).transition().duration($$.config.transition_duration).style("opacity", 1);
-    };
-
-    c3_chart_internal_fn.redraw = function (options, transitions) {
-        var $$ = this,
-            main = $$.main,
-            d3 = $$.d3,
-            config = $$.config;
-        var areaIndices = $$.getShapeIndices($$.isAreaType),
-            barIndices = $$.getShapeIndices($$.isBarType),
-            lineIndices = $$.getShapeIndices($$.isLineType);
-        var withY, withSubchart, withTransition, withTransitionForExit, withTransitionForAxis, withTransform, withUpdateXDomain, withUpdateOrgXDomain, withTrimXDomain, withLegend, withEventRect, withDimension, withUpdateXAxis;
-        var hideAxis = $$.hasArcType();
-        var drawArea, drawBar, drawLine, xForText, yForText;
-        var duration, durationForExit, durationForAxis;
-        var transitionsToWait, waitForDraw, flow, transition;
-        var targetsToShow = $$.filterTargetsToShow($$.data.targets),
-            tickValues,
-            i,
-            intervalForCulling,
-            xDomainForZoom;
-        var xv = $$.xv.bind($$),
-            cx,
-            cy;
-
-        options = options || {};
-        withY = getOption(options, "withY", true);
-        withSubchart = getOption(options, "withSubchart", true);
-        withTransition = getOption(options, "withTransition", true);
-        withTransform = getOption(options, "withTransform", false);
-        withUpdateXDomain = getOption(options, "withUpdateXDomain", false);
-        withUpdateOrgXDomain = getOption(options, "withUpdateOrgXDomain", false);
-        withTrimXDomain = getOption(options, "withTrimXDomain", true);
-        withUpdateXAxis = getOption(options, "withUpdateXAxis", withUpdateXDomain);
-        withLegend = getOption(options, "withLegend", false);
-        withEventRect = getOption(options, "withEventRect", true);
-        withDimension = getOption(options, "withDimension", true);
-        withTransitionForExit = getOption(options, "withTransitionForExit", withTransition);
-        withTransitionForAxis = getOption(options, "withTransitionForAxis", withTransition);
-
-        duration = withTransition ? config.transition_duration : 0;
-        durationForExit = withTransitionForExit ? duration : 0;
-        durationForAxis = withTransitionForAxis ? duration : 0;
-
-        transitions = transitions || $$.axis.generateTransitions(durationForAxis);
-
-        // update legend and transform each g
-        if (withLegend && config.legend_show) {
-            $$.updateLegend($$.mapToIds($$.data.targets), options, transitions);
-        } else if (withDimension) {
-            // need to update dimension (e.g. axis.y.tick.values) because y tick values should change
-            // no need to update axis in it because they will be updated in redraw()
-            $$.updateDimension(true);
-        }
-
-        // MEMO: needed for grids calculation
-        if ($$.isCategorized() && targetsToShow.length === 0) {
-            $$.x.domain([0, $$.axes.x.selectAll('.tick').size()]);
-        }
-
-        if (targetsToShow.length) {
-            $$.updateXDomain(targetsToShow, withUpdateXDomain, withUpdateOrgXDomain, withTrimXDomain);
-            if (!config.axis_x_tick_values) {
-                tickValues = $$.axis.updateXAxisTickValues(targetsToShow);
-            }
-        } else {
-            $$.xAxis.tickValues([]);
-            $$.subXAxis.tickValues([]);
-        }
-
-        if (config.zoom_rescale && !options.flow) {
-            xDomainForZoom = $$.x.orgDomain();
-        }
-
-        $$.y.domain($$.getYDomain(targetsToShow, 'y', xDomainForZoom));
-        $$.y2.domain($$.getYDomain(targetsToShow, 'y2', xDomainForZoom));
-
-        if (!config.axis_y_tick_values && config.axis_y_tick_count) {
-            $$.yAxis.tickValues($$.axis.generateTickValues($$.y.domain(), config.axis_y_tick_count));
-        }
-        if (!config.axis_y2_tick_values && config.axis_y2_tick_count) {
-            $$.y2Axis.tickValues($$.axis.generateTickValues($$.y2.domain(), config.axis_y2_tick_count));
-        }
-
-        // axes
-        $$.axis.redraw(durationForAxis, hideAxis);
-
-        // Update axis label
-        $$.axis.updateLabels(withTransition);
-
-        // show/hide if manual culling needed
-        if ((withUpdateXDomain || withUpdateXAxis) && targetsToShow.length) {
-            if (config.axis_x_tick_culling && tickValues) {
-                for (i = 1; i < tickValues.length; i++) {
-                    if (tickValues.length / i < config.axis_x_tick_culling_max) {
-                        intervalForCulling = i;
-                        break;
-                    }
-                }
-                $$.svg.selectAll('.' + CLASS.axisX + ' .tick text').each(function (e) {
-                    var index = tickValues.indexOf(e);
-                    if (index >= 0) {
-                        d3.select(this).style('display', index % intervalForCulling ? 'none' : 'block');
-                    }
-                });
-            } else {
-                $$.svg.selectAll('.' + CLASS.axisX + ' .tick text').style('display', 'block');
-            }
-        }
-
-        // setup drawer - MEMO: these must be called after axis updated
-        drawArea = $$.generateDrawArea ? $$.generateDrawArea(areaIndices, false) : undefined;
-        drawBar = $$.generateDrawBar ? $$.generateDrawBar(barIndices) : undefined;
-        drawLine = $$.generateDrawLine ? $$.generateDrawLine(lineIndices, false) : undefined;
-        xForText = $$.generateXYForText(areaIndices, barIndices, lineIndices, true);
-        yForText = $$.generateXYForText(areaIndices, barIndices, lineIndices, false);
-
-        // update circleY based on updated parameters
-        $$.updateCircleY();
-        // generate circle x/y functions depending on updated params
-        cx = ($$.config.axis_rotated ? $$.circleY : $$.circleX).bind($$);
-        cy = ($$.config.axis_rotated ? $$.circleX : $$.circleY).bind($$);
-
-        // Update sub domain
-        if (withY) {
-            $$.subY.domain($$.getYDomain(targetsToShow, 'y'));
-            $$.subY2.domain($$.getYDomain(targetsToShow, 'y2'));
-        }
-
-        // xgrid focus
-        $$.updateXgridFocus();
-
-        // Data empty label positioning and text.
-        main.select("text." + CLASS.text + '.' + CLASS.empty).attr("x", $$.width / 2).attr("y", $$.height / 2).text(config.data_empty_label_text).transition().style('opacity', targetsToShow.length ? 0 : 1);
-
-        // event rect
-        if (withEventRect) {
-            $$.redrawEventRect();
-        }
-
-        // grid
-        $$.updateGrid(duration);
-
-        // rect for regions
-        $$.updateRegion(duration);
-
-        // bars
-        $$.updateBar(durationForExit);
-
-        // lines, areas and cricles
-        $$.updateLine(durationForExit);
-        $$.updateArea(durationForExit);
-        $$.updateCircle(cx, cy);
-
-        // text
-        if ($$.hasDataLabel()) {
-            $$.updateText(xForText, yForText, durationForExit);
-        }
-
-        // title
-        if ($$.redrawTitle) {
-            $$.redrawTitle();
-        }
-
-        // arc
-        if ($$.redrawArc) {
-            $$.redrawArc(duration, durationForExit, withTransform);
-        }
-
-        // subchart
-        if ($$.redrawSubchart) {
-            $$.redrawSubchart(withSubchart, transitions, duration, durationForExit, areaIndices, barIndices, lineIndices);
-        }
-
-        // circles for select
-        main.selectAll('.' + CLASS.selectedCircles).filter($$.isBarType.bind($$)).selectAll('circle').remove();
-
-        if (options.flow) {
-            flow = $$.generateFlow({
-                targets: targetsToShow,
-                flow: options.flow,
-                duration: options.flow.duration,
-                drawBar: drawBar,
-                drawLine: drawLine,
-                drawArea: drawArea,
-                cx: cx,
-                cy: cy,
-                xv: xv,
-                xForText: xForText,
-                yForText: yForText
-            });
-        }
-
-        if ($$.isTabVisible()) {
-            // Only use transition if tab visible. See #938.
-            if (duration) {
-                // transition should be derived from one transition
-                transition = d3.transition().duration(duration);
-                transitionsToWait = [];
-                [$$.redrawBar(drawBar, true, transition), $$.redrawLine(drawLine, true, transition), $$.redrawArea(drawArea, true, transition), $$.redrawCircle(cx, cy, true, transition), $$.redrawText(xForText, yForText, options.flow, true, transition), $$.redrawRegion(true, transition), $$.redrawGrid(true, transition)].forEach(function (transitions) {
-                    transitions.forEach(function (transition) {
-                        transitionsToWait.push(transition);
-                    });
-                });
-                // Wait for end of transitions to call flow and onrendered callback
-                waitForDraw = $$.generateWait();
-                transitionsToWait.forEach(function (t) {
-                    waitForDraw.add(t);
-                });
-                waitForDraw(function () {
-                    if (flow) {
-                        flow();
-                    }
-                    if (config.onrendered) {
-                        config.onrendered.call($$);
-                    }
-                });
-            } else {
-                $$.redrawBar(drawBar);
-                $$.redrawLine(drawLine);
-                $$.redrawArea(drawArea);
-                $$.redrawCircle(cx, cy);
-                $$.redrawText(xForText, yForText, options.flow);
-                $$.redrawRegion();
-                $$.redrawGrid();
-                if (flow) {
-                    flow();
-                }
-                if (config.onrendered) {
-                    config.onrendered.call($$);
-                }
-            }
-        }
-
-        // update fadein condition
-        $$.mapToIds($$.data.targets).forEach(function (id) {
-            $$.withoutFadeIn[id] = true;
-        });
-    };
-
-    c3_chart_internal_fn.updateAndRedraw = function (options) {
-        var $$ = this,
-            config = $$.config,
-            transitions;
-        options = options || {};
-        // same with redraw
-        options.withTransition = getOption(options, "withTransition", true);
-        options.withTransform = getOption(options, "withTransform", false);
-        options.withLegend = getOption(options, "withLegend", false);
-        // NOT same with redraw
-        options.withUpdateXDomain = getOption(options, "withUpdateXDomain", true);
-        options.withUpdateOrgXDomain = getOption(options, "withUpdateOrgXDomain", true);
-        options.withTransitionForExit = false;
-        options.withTransitionForTransform = getOption(options, "withTransitionForTransform", options.withTransition);
-        // MEMO: this needs to be called before updateLegend and it means this ALWAYS needs to be called)
-        $$.updateSizes();
-        // MEMO: called in updateLegend in redraw if withLegend
-        if (!(options.withLegend && config.legend_show)) {
-            transitions = $$.axis.generateTransitions(options.withTransitionForAxis ? config.transition_duration : 0);
-            // Update scales
-            $$.updateScales();
-            $$.updateSvgSize();
-            // Update g positions
-            $$.transformAll(options.withTransitionForTransform, transitions);
-        }
-        // Draw with new sizes & scales
-        $$.redraw(options, transitions);
-    };
-    c3_chart_internal_fn.redrawWithoutRescale = function () {
-        this.redraw({
-            withY: false,
-            withSubchart: false,
-            withEventRect: false,
-            withTransitionForAxis: false
-        });
-    };
-
-    c3_chart_internal_fn.isTimeSeries = function () {
-        return this.config.axis_x_type === 'timeseries';
-    };
-    c3_chart_internal_fn.isCategorized = function () {
-        return this.config.axis_x_type.indexOf('categor') >= 0;
-    };
-    c3_chart_internal_fn.isCustomX = function () {
-        var $$ = this,
-            config = $$.config;
-        return !$$.isTimeSeries() && (config.data_x || notEmpty(config.data_xs));
-    };
-
-    c3_chart_internal_fn.isTimeSeriesY = function () {
-        return this.config.axis_y_type === 'timeseries';
-    };
-
-    c3_chart_internal_fn.getTranslate = function (target) {
-        var $$ = this,
-            config = $$.config,
-            x,
-            y;
-        if (target === 'main') {
-            x = asHalfPixel($$.margin.left);
-            y = asHalfPixel($$.margin.top);
-        } else if (target === 'context') {
-            x = asHalfPixel($$.margin2.left);
-            y = asHalfPixel($$.margin2.top);
-        } else if (target === 'legend') {
-            x = $$.margin3.left;
-            y = $$.margin3.top;
-        } else if (target === 'x') {
-            x = 0;
-            y = config.axis_rotated ? 0 : $$.height;
-        } else if (target === 'y') {
-            x = 0;
-            y = config.axis_rotated ? $$.height : 0;
-        } else if (target === 'y2') {
-            x = config.axis_rotated ? 0 : $$.width;
-            y = config.axis_rotated ? 1 : 0;
-        } else if (target === 'subx') {
-            x = 0;
-            y = config.axis_rotated ? 0 : $$.height2;
-        } else if (target === 'arc') {
-            x = $$.arcWidth / 2;
-            y = $$.arcHeight / 2 - ($$.hasType('gauge') ? 6 : 0); // to prevent wrong display of min and max label
-        }
-        return "translate(" + x + "," + y + ")";
-    };
-    c3_chart_internal_fn.initialOpacity = function (d) {
-        return d.value !== null && this.withoutFadeIn[d.id] ? 1 : 0;
-    };
-    c3_chart_internal_fn.initialOpacityForCircle = function (d) {
-        return d.value !== null && this.withoutFadeIn[d.id] ? this.opacityForCircle(d) : 0;
-    };
-    c3_chart_internal_fn.opacityForCircle = function (d) {
-        var isPointShouldBeShown = isFunction(this.config.point_show) ? this.config.point_show(d) : this.config.point_show;
-        var opacity = isPointShouldBeShown ? 1 : 0;
-        return isValue(d.value) ? this.isScatterType(d) ? 0.5 : opacity : 0;
-    };
-    c3_chart_internal_fn.opacityForText = function () {
-        return this.hasDataLabel() ? 1 : 0;
-    };
-    c3_chart_internal_fn.xx = function (d) {
-        return d ? this.x(d.x) : null;
-    };
-    c3_chart_internal_fn.xv = function (d) {
-        var $$ = this,
-            value = d.value;
-        if ($$.isTimeSeries()) {
-            value = $$.parseDate(d.value);
-        } else if ($$.isCategorized() && typeof d.value === 'string') {
-            value = $$.config.axis_x_categories.indexOf(d.value);
-        }
-        return Math.ceil($$.x(value));
-    };
-    c3_chart_internal_fn.yv = function (d) {
-        var $$ = this,
-            yScale = d.axis && d.axis === 'y2' ? $$.y2 : $$.y;
-        return Math.ceil(yScale(d.value));
-    };
-    c3_chart_internal_fn.subxx = function (d) {
-        return d ? this.subX(d.x) : null;
-    };
-
-    c3_chart_internal_fn.transformMain = function (withTransition, transitions) {
-        var $$ = this,
-            xAxis,
-            yAxis,
-            y2Axis;
-        if (transitions && transitions.axisX) {
-            xAxis = transitions.axisX;
-        } else {
-            xAxis = $$.main.select('.' + CLASS.axisX);
-            if (withTransition) {
-                xAxis = xAxis.transition();
-            }
-        }
-        if (transitions && transitions.axisY) {
-            yAxis = transitions.axisY;
-        } else {
-            yAxis = $$.main.select('.' + CLASS.axisY);
-            if (withTransition) {
-                yAxis = yAxis.transition();
-            }
-        }
-        if (transitions && transitions.axisY2) {
-            y2Axis = transitions.axisY2;
-        } else {
-            y2Axis = $$.main.select('.' + CLASS.axisY2);
-            if (withTransition) {
-                y2Axis = y2Axis.transition();
-            }
-        }
-        (withTransition ? $$.main.transition() : $$.main).attr("transform", $$.getTranslate('main'));
-        xAxis.attr("transform", $$.getTranslate('x'));
-        yAxis.attr("transform", $$.getTranslate('y'));
-        y2Axis.attr("transform", $$.getTranslate('y2'));
-        $$.main.select('.' + CLASS.chartArcs).attr("transform", $$.getTranslate('arc'));
-    };
-    c3_chart_internal_fn.transformAll = function (withTransition, transitions) {
-        var $$ = this;
-        $$.transformMain(withTransition, transitions);
-        if ($$.config.subchart_show) {
-            $$.transformContext(withTransition, transitions);
-        }
-        if ($$.legend) {
-            $$.transformLegend(withTransition);
-        }
-    };
-
-    c3_chart_internal_fn.updateSvgSize = function () {
-        var $$ = this,
-            brush = $$.svg.select(".c3-brush .overlay");
-        $$.svg.attr('width', $$.currentWidth).attr('height', $$.currentHeight);
-        $$.svg.selectAll(['#' + $$.clipId, '#' + $$.clipIdForGrid]).select('rect').attr('width', $$.width).attr('height', $$.height);
-        $$.svg.select('#' + $$.clipIdForXAxis).select('rect').attr('x', $$.getXAxisClipX.bind($$)).attr('y', $$.getXAxisClipY.bind($$)).attr('width', $$.getXAxisClipWidth.bind($$)).attr('height', $$.getXAxisClipHeight.bind($$));
-        $$.svg.select('#' + $$.clipIdForYAxis).select('rect').attr('x', $$.getYAxisClipX.bind($$)).attr('y', $$.getYAxisClipY.bind($$)).attr('width', $$.getYAxisClipWidth.bind($$)).attr('height', $$.getYAxisClipHeight.bind($$));
-        $$.svg.select('#' + $$.clipIdForSubchart).select('rect').attr('width', $$.width).attr('height', brush.size() ? brush.attr('height') : 0);
-        // MEMO: parent div's height will be bigger than svg when <!DOCTYPE html>
-        $$.selectChart.style('max-height', $$.currentHeight + "px");
-    };
-
-    c3_chart_internal_fn.updateDimension = function (withoutAxis) {
-        var $$ = this;
-        if (!withoutAxis) {
-            if ($$.config.axis_rotated) {
-                $$.axes.x.call($$.xAxis);
-                $$.axes.subx.call($$.subXAxis);
-            } else {
-                $$.axes.y.call($$.yAxis);
-                $$.axes.y2.call($$.y2Axis);
-            }
-        }
-        $$.updateSizes();
-        $$.updateScales();
-        $$.updateSvgSize();
-        $$.transformAll(false);
-    };
-
-    c3_chart_internal_fn.observeInserted = function (selection) {
-        var $$ = this,
-            observer;
-        if (typeof MutationObserver === 'undefined') {
-            window.console.error("MutationObserver not defined.");
-            return;
-        }
-        observer = new MutationObserver(function (mutations) {
-            mutations.forEach(function (mutation) {
-                if (mutation.type === 'childList' && mutation.previousSibling) {
-                    observer.disconnect();
-                    // need to wait for completion of load because size calculation requires the actual sizes determined after that completion
-                    $$.intervalForObserveInserted = window.setInterval(function () {
-                        // parentNode will NOT be null when completed
-                        if (selection.node().parentNode) {
-                            window.clearInterval($$.intervalForObserveInserted);
-                            $$.updateDimension();
-                            if ($$.brush) {
-                                $$.brush.update();
-                            }
-                            $$.config.oninit.call($$);
-                            $$.redraw({
-                                withTransform: true,
-                                withUpdateXDomain: true,
-                                withUpdateOrgXDomain: true,
-                                withTransition: false,
-                                withTransitionForTransform: false,
-                                withLegend: true
-                            });
-                            selection.transition().style('opacity', 1);
-                        }
-                    }, 10);
-                }
-            });
-        });
-        observer.observe(selection.node(), { attributes: true, childList: true, characterData: true });
-    };
-
-    c3_chart_internal_fn.bindResize = function () {
-        var $$ = this,
-            config = $$.config;
-
-        $$.resizeFunction = $$.generateResize(); // need to call .remove
-
-        $$.resizeFunction.add(function () {
-            config.onresize.call($$);
-        });
-        if (config.resize_auto) {
-            $$.resizeFunction.add(function () {
-                if ($$.resizeTimeout !== undefined) {
-                    window.clearTimeout($$.resizeTimeout);
-                }
-                $$.resizeTimeout = window.setTimeout(function () {
-                    delete $$.resizeTimeout;
-                    $$.updateAndRedraw({
-                        withUpdateXDomain: false,
-                        withUpdateOrgXDomain: false,
-                        withTransition: false,
-                        withTransitionForTransform: false,
-                        withLegend: true
-                    });
-                    if ($$.brush) {
-                        $$.brush.update();
-                    }
-                }, 100);
-            });
-        }
-        $$.resizeFunction.add(function () {
-            config.onresized.call($$);
-        });
-
-        $$.resizeIfElementDisplayed = function () {
-            // if element not displayed skip it
-            if ($$.api == null || !$$.api.element.offsetParent) {
-                return;
-            }
-
-            $$.resizeFunction();
-        };
-
-        if (window.attachEvent) {
-            window.attachEvent('onresize', $$.resizeIfElementDisplayed);
-        } else if (window.addEventListener) {
-            window.addEventListener('resize', $$.resizeIfElementDisplayed, false);
-        } else {
-            // fallback to this, if this is a very old browser
-            var wrapper = window.onresize;
-            if (!wrapper) {
-                // create a wrapper that will call all charts
-                wrapper = $$.generateResize();
-            } else if (!wrapper.add || !wrapper.remove) {
-                // there is already a handler registered, make sure we call it too
-                wrapper = $$.generateResize();
-                wrapper.add(window.onresize);
-            }
-            // add this graph to the wrapper, we will be removed if the user calls destroy
-            wrapper.add($$.resizeFunction);
-            window.onresize = function () {
-                // if element not displayed skip it
-                if (!$$.api.element.offsetParent) {
-                    return;
-                }
-
-                wrapper();
-            };
-        }
-    };
-
-    c3_chart_internal_fn.generateResize = function () {
-        var resizeFunctions = [];
-        function callResizeFunctions() {
-            resizeFunctions.forEach(function (f) {
-                f();
-            });
-        }
-        callResizeFunctions.add = function (f) {
-            resizeFunctions.push(f);
-        };
-        callResizeFunctions.remove = function (f) {
-            for (var i = 0; i < resizeFunctions.length; i++) {
-                if (resizeFunctions[i] === f) {
-                    resizeFunctions.splice(i, 1);
-                    break;
-                }
-            }
-        };
-        return callResizeFunctions;
-    };
-
-    c3_chart_internal_fn.endall = function (transition, callback) {
-        var n = 0;
-        transition.each(function () {
-            ++n;
-        }).on("end", function () {
-            if (! --n) {
-                callback.apply(this, arguments);
-            }
-        });
-    };
-    c3_chart_internal_fn.generateWait = function () {
-        var transitionsToWait = [],
-            f = function f(callback) {
-            var timer = setInterval(function () {
-                var done = 0;
-                transitionsToWait.forEach(function (t) {
-                    if (t.empty()) {
-                        done += 1;
-                        return;
-                    }
-                    try {
-                        t.transition();
-                    } catch (e) {
-                        done += 1;
-                    }
-                });
-                if (done === transitionsToWait.length) {
-                    clearInterval(timer);
-                    if (callback) {
-                        callback();
-                    }
-                }
-            }, 50);
-        };
-        f.add = function (transition) {
-            transitionsToWait.push(transition);
-        };
-        return f;
-    };
-
-    c3_chart_internal_fn.parseDate = function (date) {
-        var $$ = this,
-            parsedDate;
-        if (date instanceof Date) {
-            parsedDate = date;
-        } else if (typeof date === 'string') {
-            parsedDate = $$.dataTimeParse(date);
-        } else if ((typeof date === 'undefined' ? 'undefined' : _typeof(date)) === 'object') {
-            parsedDate = new Date(+date);
-        } else if (typeof date === 'number' && !isNaN(date)) {
-            parsedDate = new Date(+date);
-        }
-        if (!parsedDate || isNaN(+parsedDate)) {
-            window.console.error("Failed to parse x '" + date + "' to Date object");
-        }
-        return parsedDate;
-    };
-
-    c3_chart_internal_fn.isTabVisible = function () {
-        var hidden;
-        if (typeof document.hidden !== "undefined") {
-            // Opera 12.10 and Firefox 18 and later support
-            hidden = "hidden";
-        } else if (typeof document.mozHidden !== "undefined") {
-            hidden = "mozHidden";
-        } else if (typeof document.msHidden !== "undefined") {
-            hidden = "msHidden";
-        } else if (typeof document.webkitHidden !== "undefined") {
-            hidden = "webkitHidden";
-        }
-
-        return document[hidden] ? false : true;
-    };
-
-    c3_chart_internal_fn.isValue = isValue;
-    c3_chart_internal_fn.isFunction = isFunction;
-    c3_chart_internal_fn.isString = isString;
-    c3_chart_internal_fn.isUndefined = isUndefined;
-    c3_chart_internal_fn.isDefined = isDefined;
-    c3_chart_internal_fn.ceil10 = ceil10;
-    c3_chart_internal_fn.asHalfPixel = asHalfPixel;
-    c3_chart_internal_fn.diffDomain = diffDomain;
-    c3_chart_internal_fn.isEmpty = isEmpty;
-    c3_chart_internal_fn.notEmpty = notEmpty;
-    c3_chart_internal_fn.notEmpty = notEmpty;
-    c3_chart_internal_fn.getOption = getOption;
-    c3_chart_internal_fn.hasValue = hasValue;
-    c3_chart_internal_fn.sanitise = sanitise;
-    c3_chart_internal_fn.getPathBox = getPathBox;
-    c3_chart_internal_fn.CLASS = CLASS;
-
-    /* jshint ignore:start */
-
-    // PhantomJS doesn't have support for Function.prototype.bind, which has caused confusion. Use
-    // this polyfill to avoid the confusion.
-    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind#Polyfill
-
-    if (!Function.prototype.bind) {
-        Function.prototype.bind = function (oThis) {
-            if (typeof this !== 'function') {
-                // closest thing possible to the ECMAScript 5
-                // internal IsCallable function
-                throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');
-            }
-
-            var aArgs = Array.prototype.slice.call(arguments, 1),
-                fToBind = this,
-                fNOP = function fNOP() {},
-                fBound = function fBound() {
-                return fToBind.apply(this instanceof fNOP ? this : oThis, aArgs.concat(Array.prototype.slice.call(arguments)));
-            };
-
-            fNOP.prototype = this.prototype;
-            fBound.prototype = new fNOP();
-
-            return fBound;
-        };
-    }
-
-    // SVGPathSeg API polyfill
-    // https://github.com/progers/pathseg
-    //
-    // This is a drop-in replacement for the SVGPathSeg and SVGPathSegList APIs that were removed from
-    // SVG2 (https://lists.w3.org/Archives/Public/www-svg/2015Jun/0044.html), including the latest spec
-    // changes which were implemented in Firefox 43 and Chrome 46.
-
-    (function () {
-
-        if (!("SVGPathSeg" in window)) {
-            // Spec: http://www.w3.org/TR/SVG11/single-page.html#paths-InterfaceSVGPathSeg
-            window.SVGPathSeg = function (type, typeAsLetter, owningPathSegList) {
-                this.pathSegType = type;
-                this.pathSegTypeAsLetter = typeAsLetter;
-                this._owningPathSegList = owningPathSegList;
-            };
-
-            window.SVGPathSeg.prototype.classname = "SVGPathSeg";
-
-            window.SVGPathSeg.PATHSEG_UNKNOWN = 0;
-            window.SVGPathSeg.PATHSEG_CLOSEPATH = 1;
-            window.SVGPathSeg.PATHSEG_MOVETO_ABS = 2;
-            window.SVGPathSeg.PATHSEG_MOVETO_REL = 3;
-            window.SVGPathSeg.PATHSEG_LINETO_ABS = 4;
-            window.SVGPathSeg.PATHSEG_LINETO_REL = 5;
-            window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_ABS = 6;
-            window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_REL = 7;
-            window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_ABS = 8;
-            window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_REL = 9;
-            window.SVGPathSeg.PATHSEG_ARC_ABS = 10;
-            window.SVGPathSeg.PATHSEG_ARC_REL = 11;
-            window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_ABS = 12;
-            window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_REL = 13;
-            window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_ABS = 14;
-            window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_REL = 15;
-            window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_ABS = 16;
-            window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_REL = 17;
-            window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS = 18;
-            window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL = 19;
-
-            // Notify owning PathSegList on any changes so they can be synchronized back to the path element.
-            window.SVGPathSeg.prototype._segmentChanged = function () {
-                if (this._owningPathSegList) this._owningPathSegList.segmentChanged(this);
-            };
-
-            window.SVGPathSegClosePath = function (owningPathSegList) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CLOSEPATH, "z", owningPathSegList);
-            };
-            window.SVGPathSegClosePath.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegClosePath.prototype.toString = function () {
-                return "[object SVGPathSegClosePath]";
-            };
-            window.SVGPathSegClosePath.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter;
-            };
-            window.SVGPathSegClosePath.prototype.clone = function () {
-                return new window.SVGPathSegClosePath(undefined);
-            };
-
-            window.SVGPathSegMovetoAbs = function (owningPathSegList, x, y) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_MOVETO_ABS, "M", owningPathSegList);
-                this._x = x;
-                this._y = y;
-            };
-            window.SVGPathSegMovetoAbs.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegMovetoAbs.prototype.toString = function () {
-                return "[object SVGPathSegMovetoAbs]";
-            };
-            window.SVGPathSegMovetoAbs.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegMovetoAbs.prototype.clone = function () {
-                return new window.SVGPathSegMovetoAbs(undefined, this._x, this._y);
-            };
-            Object.defineProperty(window.SVGPathSegMovetoAbs.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegMovetoAbs.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegMovetoRel = function (owningPathSegList, x, y) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_MOVETO_REL, "m", owningPathSegList);
-                this._x = x;
-                this._y = y;
-            };
-            window.SVGPathSegMovetoRel.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegMovetoRel.prototype.toString = function () {
-                return "[object SVGPathSegMovetoRel]";
-            };
-            window.SVGPathSegMovetoRel.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegMovetoRel.prototype.clone = function () {
-                return new window.SVGPathSegMovetoRel(undefined, this._x, this._y);
-            };
-            Object.defineProperty(window.SVGPathSegMovetoRel.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegMovetoRel.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegLinetoAbs = function (owningPathSegList, x, y) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_ABS, "L", owningPathSegList);
-                this._x = x;
-                this._y = y;
-            };
-            window.SVGPathSegLinetoAbs.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegLinetoAbs.prototype.toString = function () {
-                return "[object SVGPathSegLinetoAbs]";
-            };
-            window.SVGPathSegLinetoAbs.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegLinetoAbs.prototype.clone = function () {
-                return new window.SVGPathSegLinetoAbs(undefined, this._x, this._y);
-            };
-            Object.defineProperty(window.SVGPathSegLinetoAbs.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegLinetoAbs.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegLinetoRel = function (owningPathSegList, x, y) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_REL, "l", owningPathSegList);
-                this._x = x;
-                this._y = y;
-            };
-            window.SVGPathSegLinetoRel.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegLinetoRel.prototype.toString = function () {
-                return "[object SVGPathSegLinetoRel]";
-            };
-            window.SVGPathSegLinetoRel.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegLinetoRel.prototype.clone = function () {
-                return new window.SVGPathSegLinetoRel(undefined, this._x, this._y);
-            };
-            Object.defineProperty(window.SVGPathSegLinetoRel.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegLinetoRel.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegCurvetoCubicAbs = function (owningPathSegList, x, y, x1, y1, x2, y2) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_ABS, "C", owningPathSegList);
-                this._x = x;
-                this._y = y;
-                this._x1 = x1;
-                this._y1 = y1;
-                this._x2 = x2;
-                this._y2 = y2;
-            };
-            window.SVGPathSegCurvetoCubicAbs.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegCurvetoCubicAbs.prototype.toString = function () {
-                return "[object SVGPathSegCurvetoCubicAbs]";
-            };
-            window.SVGPathSegCurvetoCubicAbs.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x1 + " " + this._y1 + " " + this._x2 + " " + this._y2 + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegCurvetoCubicAbs.prototype.clone = function () {
-                return new window.SVGPathSegCurvetoCubicAbs(undefined, this._x, this._y, this._x1, this._y1, this._x2, this._y2);
-            };
-            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "x1", { get: function get() {
-                    return this._x1;
-                }, set: function set(x1) {
-                    this._x1 = x1;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "y1", { get: function get() {
-                    return this._y1;
-                }, set: function set(y1) {
-                    this._y1 = y1;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "x2", { get: function get() {
-                    return this._x2;
-                }, set: function set(x2) {
-                    this._x2 = x2;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicAbs.prototype, "y2", { get: function get() {
-                    return this._y2;
-                }, set: function set(y2) {
-                    this._y2 = y2;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegCurvetoCubicRel = function (owningPathSegList, x, y, x1, y1, x2, y2) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_REL, "c", owningPathSegList);
-                this._x = x;
-                this._y = y;
-                this._x1 = x1;
-                this._y1 = y1;
-                this._x2 = x2;
-                this._y2 = y2;
-            };
-            window.SVGPathSegCurvetoCubicRel.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegCurvetoCubicRel.prototype.toString = function () {
-                return "[object SVGPathSegCurvetoCubicRel]";
-            };
-            window.SVGPathSegCurvetoCubicRel.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x1 + " " + this._y1 + " " + this._x2 + " " + this._y2 + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegCurvetoCubicRel.prototype.clone = function () {
-                return new window.SVGPathSegCurvetoCubicRel(undefined, this._x, this._y, this._x1, this._y1, this._x2, this._y2);
-            };
-            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "x1", { get: function get() {
-                    return this._x1;
-                }, set: function set(x1) {
-                    this._x1 = x1;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "y1", { get: function get() {
-                    return this._y1;
-                }, set: function set(y1) {
-                    this._y1 = y1;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "x2", { get: function get() {
-                    return this._x2;
-                }, set: function set(x2) {
-                    this._x2 = x2;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicRel.prototype, "y2", { get: function get() {
-                    return this._y2;
-                }, set: function set(y2) {
-                    this._y2 = y2;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegCurvetoQuadraticAbs = function (owningPathSegList, x, y, x1, y1) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_ABS, "Q", owningPathSegList);
-                this._x = x;
-                this._y = y;
-                this._x1 = x1;
-                this._y1 = y1;
-            };
-            window.SVGPathSegCurvetoQuadraticAbs.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegCurvetoQuadraticAbs.prototype.toString = function () {
-                return "[object SVGPathSegCurvetoQuadraticAbs]";
-            };
-            window.SVGPathSegCurvetoQuadraticAbs.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x1 + " " + this._y1 + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegCurvetoQuadraticAbs.prototype.clone = function () {
-                return new window.SVGPathSegCurvetoQuadraticAbs(undefined, this._x, this._y, this._x1, this._y1);
-            };
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticAbs.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticAbs.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticAbs.prototype, "x1", { get: function get() {
-                    return this._x1;
-                }, set: function set(x1) {
-                    this._x1 = x1;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticAbs.prototype, "y1", { get: function get() {
-                    return this._y1;
-                }, set: function set(y1) {
-                    this._y1 = y1;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegCurvetoQuadraticRel = function (owningPathSegList, x, y, x1, y1) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_REL, "q", owningPathSegList);
-                this._x = x;
-                this._y = y;
-                this._x1 = x1;
-                this._y1 = y1;
-            };
-            window.SVGPathSegCurvetoQuadraticRel.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegCurvetoQuadraticRel.prototype.toString = function () {
-                return "[object SVGPathSegCurvetoQuadraticRel]";
-            };
-            window.SVGPathSegCurvetoQuadraticRel.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x1 + " " + this._y1 + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegCurvetoQuadraticRel.prototype.clone = function () {
-                return new window.SVGPathSegCurvetoQuadraticRel(undefined, this._x, this._y, this._x1, this._y1);
-            };
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticRel.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticRel.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticRel.prototype, "x1", { get: function get() {
-                    return this._x1;
-                }, set: function set(x1) {
-                    this._x1 = x1;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticRel.prototype, "y1", { get: function get() {
-                    return this._y1;
-                }, set: function set(y1) {
-                    this._y1 = y1;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegArcAbs = function (owningPathSegList, x, y, r1, r2, angle, largeArcFlag, sweepFlag) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_ARC_ABS, "A", owningPathSegList);
-                this._x = x;
-                this._y = y;
-                this._r1 = r1;
-                this._r2 = r2;
-                this._angle = angle;
-                this._largeArcFlag = largeArcFlag;
-                this._sweepFlag = sweepFlag;
-            };
-            window.SVGPathSegArcAbs.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegArcAbs.prototype.toString = function () {
-                return "[object SVGPathSegArcAbs]";
-            };
-            window.SVGPathSegArcAbs.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._r1 + " " + this._r2 + " " + this._angle + " " + (this._largeArcFlag ? "1" : "0") + " " + (this._sweepFlag ? "1" : "0") + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegArcAbs.prototype.clone = function () {
-                return new window.SVGPathSegArcAbs(undefined, this._x, this._y, this._r1, this._r2, this._angle, this._largeArcFlag, this._sweepFlag);
-            };
-            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "r1", { get: function get() {
-                    return this._r1;
-                }, set: function set(r1) {
-                    this._r1 = r1;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "r2", { get: function get() {
-                    return this._r2;
-                }, set: function set(r2) {
-                    this._r2 = r2;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "angle", { get: function get() {
-                    return this._angle;
-                }, set: function set(angle) {
-                    this._angle = angle;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "largeArcFlag", { get: function get() {
-                    return this._largeArcFlag;
-                }, set: function set(largeArcFlag) {
-                    this._largeArcFlag = largeArcFlag;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcAbs.prototype, "sweepFlag", { get: function get() {
-                    return this._sweepFlag;
-                }, set: function set(sweepFlag) {
-                    this._sweepFlag = sweepFlag;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegArcRel = function (owningPathSegList, x, y, r1, r2, angle, largeArcFlag, sweepFlag) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_ARC_REL, "a", owningPathSegList);
-                this._x = x;
-                this._y = y;
-                this._r1 = r1;
-                this._r2 = r2;
-                this._angle = angle;
-                this._largeArcFlag = largeArcFlag;
-                this._sweepFlag = sweepFlag;
-            };
-            window.SVGPathSegArcRel.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegArcRel.prototype.toString = function () {
-                return "[object SVGPathSegArcRel]";
-            };
-            window.SVGPathSegArcRel.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._r1 + " " + this._r2 + " " + this._angle + " " + (this._largeArcFlag ? "1" : "0") + " " + (this._sweepFlag ? "1" : "0") + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegArcRel.prototype.clone = function () {
-                return new window.SVGPathSegArcRel(undefined, this._x, this._y, this._r1, this._r2, this._angle, this._largeArcFlag, this._sweepFlag);
-            };
-            Object.defineProperty(window.SVGPathSegArcRel.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcRel.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcRel.prototype, "r1", { get: function get() {
-                    return this._r1;
-                }, set: function set(r1) {
-                    this._r1 = r1;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcRel.prototype, "r2", { get: function get() {
-                    return this._r2;
-                }, set: function set(r2) {
-                    this._r2 = r2;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcRel.prototype, "angle", { get: function get() {
-                    return this._angle;
-                }, set: function set(angle) {
-                    this._angle = angle;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcRel.prototype, "largeArcFlag", { get: function get() {
-                    return this._largeArcFlag;
-                }, set: function set(largeArcFlag) {
-                    this._largeArcFlag = largeArcFlag;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegArcRel.prototype, "sweepFlag", { get: function get() {
-                    return this._sweepFlag;
-                }, set: function set(sweepFlag) {
-                    this._sweepFlag = sweepFlag;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegLinetoHorizontalAbs = function (owningPathSegList, x) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_ABS, "H", owningPathSegList);
-                this._x = x;
-            };
-            window.SVGPathSegLinetoHorizontalAbs.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegLinetoHorizontalAbs.prototype.toString = function () {
-                return "[object SVGPathSegLinetoHorizontalAbs]";
-            };
-            window.SVGPathSegLinetoHorizontalAbs.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x;
-            };
-            window.SVGPathSegLinetoHorizontalAbs.prototype.clone = function () {
-                return new window.SVGPathSegLinetoHorizontalAbs(undefined, this._x);
-            };
-            Object.defineProperty(window.SVGPathSegLinetoHorizontalAbs.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegLinetoHorizontalRel = function (owningPathSegList, x) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_REL, "h", owningPathSegList);
-                this._x = x;
-            };
-            window.SVGPathSegLinetoHorizontalRel.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegLinetoHorizontalRel.prototype.toString = function () {
-                return "[object SVGPathSegLinetoHorizontalRel]";
-            };
-            window.SVGPathSegLinetoHorizontalRel.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x;
-            };
-            window.SVGPathSegLinetoHorizontalRel.prototype.clone = function () {
-                return new window.SVGPathSegLinetoHorizontalRel(undefined, this._x);
-            };
-            Object.defineProperty(window.SVGPathSegLinetoHorizontalRel.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegLinetoVerticalAbs = function (owningPathSegList, y) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_ABS, "V", owningPathSegList);
-                this._y = y;
-            };
-            window.SVGPathSegLinetoVerticalAbs.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegLinetoVerticalAbs.prototype.toString = function () {
-                return "[object SVGPathSegLinetoVerticalAbs]";
-            };
-            window.SVGPathSegLinetoVerticalAbs.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._y;
-            };
-            window.SVGPathSegLinetoVerticalAbs.prototype.clone = function () {
-                return new window.SVGPathSegLinetoVerticalAbs(undefined, this._y);
-            };
-            Object.defineProperty(window.SVGPathSegLinetoVerticalAbs.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegLinetoVerticalRel = function (owningPathSegList, y) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_REL, "v", owningPathSegList);
-                this._y = y;
-            };
-            window.SVGPathSegLinetoVerticalRel.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegLinetoVerticalRel.prototype.toString = function () {
-                return "[object SVGPathSegLinetoVerticalRel]";
-            };
-            window.SVGPathSegLinetoVerticalRel.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._y;
-            };
-            window.SVGPathSegLinetoVerticalRel.prototype.clone = function () {
-                return new window.SVGPathSegLinetoVerticalRel(undefined, this._y);
-            };
-            Object.defineProperty(window.SVGPathSegLinetoVerticalRel.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegCurvetoCubicSmoothAbs = function (owningPathSegList, x, y, x2, y2) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_ABS, "S", owningPathSegList);
-                this._x = x;
-                this._y = y;
-                this._x2 = x2;
-                this._y2 = y2;
-            };
-            window.SVGPathSegCurvetoCubicSmoothAbs.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegCurvetoCubicSmoothAbs.prototype.toString = function () {
-                return "[object SVGPathSegCurvetoCubicSmoothAbs]";
-            };
-            window.SVGPathSegCurvetoCubicSmoothAbs.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x2 + " " + this._y2 + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegCurvetoCubicSmoothAbs.prototype.clone = function () {
-                return new window.SVGPathSegCurvetoCubicSmoothAbs(undefined, this._x, this._y, this._x2, this._y2);
-            };
-            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothAbs.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothAbs.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothAbs.prototype, "x2", { get: function get() {
-                    return this._x2;
-                }, set: function set(x2) {
-                    this._x2 = x2;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothAbs.prototype, "y2", { get: function get() {
-                    return this._y2;
-                }, set: function set(y2) {
-                    this._y2 = y2;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegCurvetoCubicSmoothRel = function (owningPathSegList, x, y, x2, y2) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_REL, "s", owningPathSegList);
-                this._x = x;
-                this._y = y;
-                this._x2 = x2;
-                this._y2 = y2;
-            };
-            window.SVGPathSegCurvetoCubicSmoothRel.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegCurvetoCubicSmoothRel.prototype.toString = function () {
-                return "[object SVGPathSegCurvetoCubicSmoothRel]";
-            };
-            window.SVGPathSegCurvetoCubicSmoothRel.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x2 + " " + this._y2 + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegCurvetoCubicSmoothRel.prototype.clone = function () {
-                return new window.SVGPathSegCurvetoCubicSmoothRel(undefined, this._x, this._y, this._x2, this._y2);
-            };
-            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothRel.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothRel.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothRel.prototype, "x2", { get: function get() {
-                    return this._x2;
-                }, set: function set(x2) {
-                    this._x2 = x2;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoCubicSmoothRel.prototype, "y2", { get: function get() {
-                    return this._y2;
-                }, set: function set(y2) {
-                    this._y2 = y2;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegCurvetoQuadraticSmoothAbs = function (owningPathSegList, x, y) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS, "T", owningPathSegList);
-                this._x = x;
-                this._y = y;
-            };
-            window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype.toString = function () {
-                return "[object SVGPathSegCurvetoQuadraticSmoothAbs]";
-            };
-            window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype.clone = function () {
-                return new window.SVGPathSegCurvetoQuadraticSmoothAbs(undefined, this._x, this._y);
-            };
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticSmoothAbs.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-
-            window.SVGPathSegCurvetoQuadraticSmoothRel = function (owningPathSegList, x, y) {
-                window.SVGPathSeg.call(this, window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL, "t", owningPathSegList);
-                this._x = x;
-                this._y = y;
-            };
-            window.SVGPathSegCurvetoQuadraticSmoothRel.prototype = Object.create(window.SVGPathSeg.prototype);
-            window.SVGPathSegCurvetoQuadraticSmoothRel.prototype.toString = function () {
-                return "[object SVGPathSegCurvetoQuadraticSmoothRel]";
-            };
-            window.SVGPathSegCurvetoQuadraticSmoothRel.prototype._asPathString = function () {
-                return this.pathSegTypeAsLetter + " " + this._x + " " + this._y;
-            };
-            window.SVGPathSegCurvetoQuadraticSmoothRel.prototype.clone = function () {
-                return new window.SVGPathSegCurvetoQuadraticSmoothRel(undefined, this._x, this._y);
-            };
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticSmoothRel.prototype, "x", { get: function get() {
-                    return this._x;
-                }, set: function set(x) {
-                    this._x = x;this._segmentChanged();
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathSegCurvetoQuadraticSmoothRel.prototype, "y", { get: function get() {
-                    return this._y;
-                }, set: function set(y) {
-                    this._y = y;this._segmentChanged();
-                }, enumerable: true });
-
-            // Add createSVGPathSeg* functions to window.SVGPathElement.
-            // Spec: http://www.w3.org/TR/SVG11/single-page.html#paths-Interfacewindow.SVGPathElement.
-            window.SVGPathElement.prototype.createSVGPathSegClosePath = function () {
-                return new window.SVGPathSegClosePath(undefined);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegMovetoAbs = function (x, y) {
-                return new window.SVGPathSegMovetoAbs(undefined, x, y);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegMovetoRel = function (x, y) {
-                return new window.SVGPathSegMovetoRel(undefined, x, y);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegLinetoAbs = function (x, y) {
-                return new window.SVGPathSegLinetoAbs(undefined, x, y);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegLinetoRel = function (x, y) {
-                return new window.SVGPathSegLinetoRel(undefined, x, y);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegCurvetoCubicAbs = function (x, y, x1, y1, x2, y2) {
-                return new window.SVGPathSegCurvetoCubicAbs(undefined, x, y, x1, y1, x2, y2);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegCurvetoCubicRel = function (x, y, x1, y1, x2, y2) {
-                return new window.SVGPathSegCurvetoCubicRel(undefined, x, y, x1, y1, x2, y2);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegCurvetoQuadraticAbs = function (x, y, x1, y1) {
-                return new window.SVGPathSegCurvetoQuadraticAbs(undefined, x, y, x1, y1);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegCurvetoQuadraticRel = function (x, y, x1, y1) {
-                return new window.SVGPathSegCurvetoQuadraticRel(undefined, x, y, x1, y1);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegArcAbs = function (x, y, r1, r2, angle, largeArcFlag, sweepFlag) {
-                return new window.SVGPathSegArcAbs(undefined, x, y, r1, r2, angle, largeArcFlag, sweepFlag);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegArcRel = function (x, y, r1, r2, angle, largeArcFlag, sweepFlag) {
-                return new window.SVGPathSegArcRel(undefined, x, y, r1, r2, angle, largeArcFlag, sweepFlag);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegLinetoHorizontalAbs = function (x) {
-                return new window.SVGPathSegLinetoHorizontalAbs(undefined, x);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegLinetoHorizontalRel = function (x) {
-                return new window.SVGPathSegLinetoHorizontalRel(undefined, x);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegLinetoVerticalAbs = function (y) {
-                return new window.SVGPathSegLinetoVerticalAbs(undefined, y);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegLinetoVerticalRel = function (y) {
-                return new window.SVGPathSegLinetoVerticalRel(undefined, y);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegCurvetoCubicSmoothAbs = function (x, y, x2, y2) {
-                return new window.SVGPathSegCurvetoCubicSmoothAbs(undefined, x, y, x2, y2);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegCurvetoCubicSmoothRel = function (x, y, x2, y2) {
-                return new window.SVGPathSegCurvetoCubicSmoothRel(undefined, x, y, x2, y2);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegCurvetoQuadraticSmoothAbs = function (x, y) {
-                return new window.SVGPathSegCurvetoQuadraticSmoothAbs(undefined, x, y);
-            };
-            window.SVGPathElement.prototype.createSVGPathSegCurvetoQuadraticSmoothRel = function (x, y) {
-                return new window.SVGPathSegCurvetoQuadraticSmoothRel(undefined, x, y);
-            };
-
-            if (!("getPathSegAtLength" in window.SVGPathElement.prototype)) {
-                // Add getPathSegAtLength to SVGPathElement.
-                // Spec: https://www.w3.org/TR/SVG11/single-page.html#paths-__svg__SVGPathElement__getPathSegAtLength
-                // This polyfill requires SVGPathElement.getTotalLength to implement the distance-along-a-path algorithm.
-                window.SVGPathElement.prototype.getPathSegAtLength = function (distance) {
-                    if (distance === undefined || !isFinite(distance)) throw "Invalid arguments.";
-
-                    var measurementElement = document.createElementNS("http://www.w3.org/2000/svg", "path");
-                    measurementElement.setAttribute("d", this.getAttribute("d"));
-                    var lastPathSegment = measurementElement.pathSegList.numberOfItems - 1;
-
-                    // If the path is empty, return 0.
-                    if (lastPathSegment <= 0) return 0;
-
-                    do {
-                        measurementElement.pathSegList.removeItem(lastPathSegment);
-                        if (distance > measurementElement.getTotalLength()) break;
-                        lastPathSegment--;
-                    } while (lastPathSegment > 0);
-                    return lastPathSegment;
-                };
-            }
-        }
-
-        if (!("SVGPathSegList" in window)) {
-            // Spec: http://www.w3.org/TR/SVG11/single-page.html#paths-InterfaceSVGPathSegList
-            window.SVGPathSegList = function (pathElement) {
-                this._pathElement = pathElement;
-                this._list = this._parsePath(this._pathElement.getAttribute("d"));
-
-                // Use a MutationObserver to catch changes to the path's "d" attribute.
-                this._mutationObserverConfig = { "attributes": true, "attributeFilter": ["d"] };
-                this._pathElementMutationObserver = new MutationObserver(this._updateListFromPathMutations.bind(this));
-                this._pathElementMutationObserver.observe(this._pathElement, this._mutationObserverConfig);
-            };
-
-            window.SVGPathSegList.prototype.classname = "SVGPathSegList";
-
-            Object.defineProperty(window.SVGPathSegList.prototype, "numberOfItems", {
-                get: function get() {
-                    this._checkPathSynchronizedToList();
-                    return this._list.length;
-                },
-                enumerable: true
-            });
-
-            // Add the pathSegList accessors to window.SVGPathElement.
-            // Spec: http://www.w3.org/TR/SVG11/single-page.html#paths-InterfaceSVGAnimatedPathData
-            Object.defineProperty(window.SVGPathElement.prototype, "pathSegList", {
-                get: function get() {
-                    if (!this._pathSegList) this._pathSegList = new window.SVGPathSegList(this);
-                    return this._pathSegList;
-                },
-                enumerable: true
-            });
-            // FIXME: The following are not implemented and simply return window.SVGPathElement.pathSegList.
-            Object.defineProperty(window.SVGPathElement.prototype, "normalizedPathSegList", { get: function get() {
-                    return this.pathSegList;
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathElement.prototype, "animatedPathSegList", { get: function get() {
-                    return this.pathSegList;
-                }, enumerable: true });
-            Object.defineProperty(window.SVGPathElement.prototype, "animatedNormalizedPathSegList", { get: function get() {
-                    return this.pathSegList;
-                }, enumerable: true });
-
-            // Process any pending mutations to the path element and update the list as needed.
-            // This should be the first call of all public functions and is needed because
-            // MutationObservers are not synchronous so we can have pending asynchronous mutations.
-            window.SVGPathSegList.prototype._checkPathSynchronizedToList = function () {
-                this._updateListFromPathMutations(this._pathElementMutationObserver.takeRecords());
-            };
-
-            window.SVGPathSegList.prototype._updateListFromPathMutations = function (mutationRecords) {
-                if (!this._pathElement) return;
-                var hasPathMutations = false;
-                mutationRecords.forEach(function (record) {
-                    if (record.attributeName == "d") hasPathMutations = true;
-                });
-                if (hasPathMutations) this._list = this._parsePath(this._pathElement.getAttribute("d"));
-            };
-
-            // Serialize the list and update the path's 'd' attribute.
-            window.SVGPathSegList.prototype._writeListToPath = function () {
-                this._pathElementMutationObserver.disconnect();
-                this._pathElement.setAttribute("d", window.SVGPathSegList._pathSegArrayAsString(this._list));
-                this._pathElementMutationObserver.observe(this._pathElement, this._mutationObserverConfig);
-            };
-
-            // When a path segment changes the list needs to be synchronized back to the path element.
-            window.SVGPathSegList.prototype.segmentChanged = function (pathSeg) {
-                this._writeListToPath();
-            };
-
-            window.SVGPathSegList.prototype.clear = function () {
-                this._checkPathSynchronizedToList();
-
-                this._list.forEach(function (pathSeg) {
-                    pathSeg._owningPathSegList = null;
-                });
-                this._list = [];
-                this._writeListToPath();
-            };
-
-            window.SVGPathSegList.prototype.initialize = function (newItem) {
-                this._checkPathSynchronizedToList();
-
-                this._list = [newItem];
-                newItem._owningPathSegList = this;
-                this._writeListToPath();
-                return newItem;
-            };
-
-            window.SVGPathSegList.prototype._checkValidIndex = function (index) {
-                if (isNaN(index) || index < 0 || index >= this.numberOfItems) throw "INDEX_SIZE_ERR";
-            };
-
-            window.SVGPathSegList.prototype.getItem = function (index) {
-                this._checkPathSynchronizedToList();
-
-                this._checkValidIndex(index);
-                return this._list[index];
-            };
-
-            window.SVGPathSegList.prototype.insertItemBefore = function (newItem, index) {
-                this._checkPathSynchronizedToList();
-
-                // Spec: If the index is greater than or equal to numberOfItems, then the new item is appended to the end of the list.
-                if (index > this.numberOfItems) index = this.numberOfItems;
-                if (newItem._owningPathSegList) {
-                    // SVG2 spec says to make a copy.
-                    newItem = newItem.clone();
-                }
-                this._list.splice(index, 0, newItem);
-                newItem._owningPathSegList = this;
-                this._writeListToPath();
-                return newItem;
-            };
-
-            window.SVGPathSegList.prototype.replaceItem = function (newItem, index) {
-                this._checkPathSynchronizedToList();
-
-                if (newItem._owningPathSegList) {
-                    // SVG2 spec says to make a copy.
-                    newItem = newItem.clone();
-                }
-                this._checkValidIndex(index);
-                this._list[index] = newItem;
-                newItem._owningPathSegList = this;
-                this._writeListToPath();
-                return newItem;
-            };
-
-            window.SVGPathSegList.prototype.removeItem = function (index) {
-                this._checkPathSynchronizedToList();
-
-                this._checkValidIndex(index);
-                var item = this._list[index];
-                this._list.splice(index, 1);
-                this._writeListToPath();
-                return item;
-            };
-
-            window.SVGPathSegList.prototype.appendItem = function (newItem) {
-                this._checkPathSynchronizedToList();
-
-                if (newItem._owningPathSegList) {
-                    // SVG2 spec says to make a copy.
-                    newItem = newItem.clone();
-                }
-                this._list.push(newItem);
-                newItem._owningPathSegList = this;
-                // TODO: Optimize this to just append to the existing attribute.
-                this._writeListToPath();
-                return newItem;
-            };
-
-            window.SVGPathSegList._pathSegArrayAsString = function (pathSegArray) {
-                var string = "";
-                var first = true;
-                pathSegArray.forEach(function (pathSeg) {
-                    if (first) {
-                        first = false;
-                        string += pathSeg._asPathString();
-                    } else {
-                        string += " " + pathSeg._asPathString();
-                    }
-                });
-                return string;
-            };
-
-            // This closely follows SVGPathParser::parsePath from Source/core/svg/SVGPathParser.cpp.
-            window.SVGPathSegList.prototype._parsePath = function (string) {
-                if (!string || string.length == 0) return [];
-
-                var owningPathSegList = this;
-
-                var Builder = function Builder() {
-                    this.pathSegList = [];
-                };
-
-                Builder.prototype.appendSegment = function (pathSeg) {
-                    this.pathSegList.push(pathSeg);
-                };
-
-                var Source = function Source(string) {
-                    this._string = string;
-                    this._currentIndex = 0;
-                    this._endIndex = this._string.length;
-                    this._previousCommand = window.SVGPathSeg.PATHSEG_UNKNOWN;
-
-                    this._skipOptionalSpaces();
-                };
-
-                Source.prototype._isCurrentSpace = function () {
-                    var character = this._string[this._currentIndex];
-                    return character <= " " && (character == " " || character == "\n" || character == "\t" || character == "\r" || character == "\f");
-                };
-
-                Source.prototype._skipOptionalSpaces = function () {
-                    while (this._currentIndex < this._endIndex && this._isCurrentSpace()) {
-                        this._currentIndex++;
-                    }return this._currentIndex < this._endIndex;
-                };
-
-                Source.prototype._skipOptionalSpacesOrDelimiter = function () {
-                    if (this._currentIndex < this._endIndex && !this._isCurrentSpace() && this._string.charAt(this._currentIndex) != ",") return false;
-                    if (this._skipOptionalSpaces()) {
-                        if (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) == ",") {
-                            this._currentIndex++;
-                            this._skipOptionalSpaces();
-                        }
-                    }
-                    return this._currentIndex < this._endIndex;
-                };
-
-                Source.prototype.hasMoreData = function () {
-                    return this._currentIndex < this._endIndex;
-                };
-
-                Source.prototype.peekSegmentType = function () {
-                    var lookahead = this._string[this._currentIndex];
-                    return this._pathSegTypeFromChar(lookahead);
-                };
-
-                Source.prototype._pathSegTypeFromChar = function (lookahead) {
-                    switch (lookahead) {
-                        case "Z":
-                        case "z":
-                            return window.SVGPathSeg.PATHSEG_CLOSEPATH;
-                        case "M":
-                            return window.SVGPathSeg.PATHSEG_MOVETO_ABS;
-                        case "m":
-                            return window.SVGPathSeg.PATHSEG_MOVETO_REL;
-                        case "L":
-                            return window.SVGPathSeg.PATHSEG_LINETO_ABS;
-                        case "l":
-                            return window.SVGPathSeg.PATHSEG_LINETO_REL;
-                        case "C":
-                            return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_ABS;
-                        case "c":
-                            return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_REL;
-                        case "Q":
-                            return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_ABS;
-                        case "q":
-                            return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_REL;
-                        case "A":
-                            return window.SVGPathSeg.PATHSEG_ARC_ABS;
-                        case "a":
-                            return window.SVGPathSeg.PATHSEG_ARC_REL;
-                        case "H":
-                            return window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_ABS;
-                        case "h":
-                            return window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_REL;
-                        case "V":
-                            return window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_ABS;
-                        case "v":
-                            return window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_REL;
-                        case "S":
-                            return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_ABS;
-                        case "s":
-                            return window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_REL;
-                        case "T":
-                            return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS;
-                        case "t":
-                            return window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL;
-                        default:
-                            return window.SVGPathSeg.PATHSEG_UNKNOWN;
-                    }
-                };
-
-                Source.prototype._nextCommandHelper = function (lookahead, previousCommand) {
-                    // Check for remaining coordinates in the current command.
-                    if ((lookahead == "+" || lookahead == "-" || lookahead == "." || lookahead >= "0" && lookahead <= "9") && previousCommand != window.SVGPathSeg.PATHSEG_CLOSEPATH) {
-                        if (previousCommand == window.SVGPathSeg.PATHSEG_MOVETO_ABS) return window.SVGPathSeg.PATHSEG_LINETO_ABS;
-                        if (previousCommand == window.SVGPathSeg.PATHSEG_MOVETO_REL) return window.SVGPathSeg.PATHSEG_LINETO_REL;
-                        return previousCommand;
-                    }
-                    return window.SVGPathSeg.PATHSEG_UNKNOWN;
-                };
-
-                Source.prototype.initialCommandIsMoveTo = function () {
-                    // If the path is empty it is still valid, so return true.
-                    if (!this.hasMoreData()) return true;
-                    var command = this.peekSegmentType();
-                    // Path must start with moveTo.
-                    return command == window.SVGPathSeg.PATHSEG_MOVETO_ABS || command == window.SVGPathSeg.PATHSEG_MOVETO_REL;
-                };
-
-                // Parse a number from an SVG path. This very closely follows genericParseNumber(...) from Source/core/svg/SVGParserUtilities.cpp.
-                // Spec: http://www.w3.org/TR/SVG11/single-page.html#paths-PathDataBNF
-                Source.prototype._parseNumber = function () {
-                    var exponent = 0;
-                    var integer = 0;
-                    var frac = 1;
-                    var decimal = 0;
-                    var sign = 1;
-                    var expsign = 1;
-
-                    var startIndex = this._currentIndex;
-
-                    this._skipOptionalSpaces();
-
-                    // Read the sign.
-                    if (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) == "+") this._currentIndex++;else if (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) == "-") {
-                        this._currentIndex++;
-                        sign = -1;
-                    }
-
-                    if (this._currentIndex == this._endIndex || (this._string.charAt(this._currentIndex) < "0" || this._string.charAt(this._currentIndex) > "9") && this._string.charAt(this._currentIndex) != ".")
-                        // The first character of a number must be one of [0-9+-.].
-                        return undefined;
-
-                    // Read the integer part, build right-to-left.
-                    var startIntPartIndex = this._currentIndex;
-                    while (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) >= "0" && this._string.charAt(this._currentIndex) <= "9") {
-                        this._currentIndex++;
-                    } // Advance to first non-digit.
-
-                    if (this._currentIndex != startIntPartIndex) {
-                        var scanIntPartIndex = this._currentIndex - 1;
-                        var multiplier = 1;
-                        while (scanIntPartIndex >= startIntPartIndex) {
-                            integer += multiplier * (this._string.charAt(scanIntPartIndex--) - "0");
-                            multiplier *= 10;
-                        }
-                    }
-
-                    // Read the decimals.
-                    if (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) == ".") {
-                        this._currentIndex++;
-
-                        // There must be a least one digit following the .
-                        if (this._currentIndex >= this._endIndex || this._string.charAt(this._currentIndex) < "0" || this._string.charAt(this._currentIndex) > "9") return undefined;
-                        while (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) >= "0" && this._string.charAt(this._currentIndex) <= "9") {
-                            frac *= 10;
-                            decimal += (this._string.charAt(this._currentIndex) - "0") / frac;
-                            this._currentIndex += 1;
-                        }
-                    }
-
-                    // Read the exponent part.
-                    if (this._currentIndex != startIndex && this._currentIndex + 1 < this._endIndex && (this._string.charAt(this._currentIndex) == "e" || this._string.charAt(this._currentIndex) == "E") && this._string.charAt(this._currentIndex + 1) != "x" && this._string.charAt(this._currentIndex + 1) != "m") {
-                        this._currentIndex++;
-
-                        // Read the sign of the exponent.
-                        if (this._string.charAt(this._currentIndex) == "+") {
-                            this._currentIndex++;
-                        } else if (this._string.charAt(this._currentIndex) == "-") {
-                            this._currentIndex++;
-                            expsign = -1;
-                        }
-
-                        // There must be an exponent.
-                        if (this._currentIndex >= this._endIndex || this._string.charAt(this._currentIndex) < "0" || this._string.charAt(this._currentIndex) > "9") return undefined;
-
-                        while (this._currentIndex < this._endIndex && this._string.charAt(this._currentIndex) >= "0" && this._string.charAt(this._currentIndex) <= "9") {
-                            exponent *= 10;
-                            exponent += this._string.charAt(this._currentIndex) - "0";
-                            this._currentIndex++;
-                        }
-                    }
-
-                    var number = integer + decimal;
-                    number *= sign;
-
-                    if (exponent) number *= Math.pow(10, expsign * exponent);
-
-                    if (startIndex == this._currentIndex) return undefined;
-
-                    this._skipOptionalSpacesOrDelimiter();
-
-                    return number;
-                };
-
-                Source.prototype._parseArcFlag = function () {
-                    if (this._currentIndex >= this._endIndex) return undefined;
-                    var flag = false;
-                    var flagChar = this._string.charAt(this._currentIndex++);
-                    if (flagChar == "0") flag = false;else if (flagChar == "1") flag = true;else return undefined;
-
-                    this._skipOptionalSpacesOrDelimiter();
-                    return flag;
-                };
-
-                Source.prototype.parseSegment = function () {
-                    var lookahead = this._string[this._currentIndex];
-                    var command = this._pathSegTypeFromChar(lookahead);
-                    if (command == window.SVGPathSeg.PATHSEG_UNKNOWN) {
-                        // Possibly an implicit command. Not allowed if this is the first command.
-                        if (this._previousCommand == window.SVGPathSeg.PATHSEG_UNKNOWN) return null;
-                        command = this._nextCommandHelper(lookahead, this._previousCommand);
-                        if (command == window.SVGPathSeg.PATHSEG_UNKNOWN) return null;
-                    } else {
-                        this._currentIndex++;
-                    }
-
-                    this._previousCommand = command;
-
-                    switch (command) {
-                        case window.SVGPathSeg.PATHSEG_MOVETO_REL:
-                            return new window.SVGPathSegMovetoRel(owningPathSegList, this._parseNumber(), this._parseNumber());
-                        case window.SVGPathSeg.PATHSEG_MOVETO_ABS:
-                            return new window.SVGPathSegMovetoAbs(owningPathSegList, this._parseNumber(), this._parseNumber());
-                        case window.SVGPathSeg.PATHSEG_LINETO_REL:
-                            return new window.SVGPathSegLinetoRel(owningPathSegList, this._parseNumber(), this._parseNumber());
-                        case window.SVGPathSeg.PATHSEG_LINETO_ABS:
-                            return new window.SVGPathSegLinetoAbs(owningPathSegList, this._parseNumber(), this._parseNumber());
-                        case window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_REL:
-                            return new window.SVGPathSegLinetoHorizontalRel(owningPathSegList, this._parseNumber());
-                        case window.SVGPathSeg.PATHSEG_LINETO_HORIZONTAL_ABS:
-                            return new window.SVGPathSegLinetoHorizontalAbs(owningPathSegList, this._parseNumber());
-                        case window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_REL:
-                            return new window.SVGPathSegLinetoVerticalRel(owningPathSegList, this._parseNumber());
-                        case window.SVGPathSeg.PATHSEG_LINETO_VERTICAL_ABS:
-                            return new window.SVGPathSegLinetoVerticalAbs(owningPathSegList, this._parseNumber());
-                        case window.SVGPathSeg.PATHSEG_CLOSEPATH:
-                            this._skipOptionalSpaces();
-                            return new window.SVGPathSegClosePath(owningPathSegList);
-                        case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_REL:
-                            var points = { x1: this._parseNumber(), y1: this._parseNumber(), x2: this._parseNumber(), y2: this._parseNumber(), x: this._parseNumber(), y: this._parseNumber() };
-                            return new window.SVGPathSegCurvetoCubicRel(owningPathSegList, points.x, points.y, points.x1, points.y1, points.x2, points.y2);
-                        case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_ABS:
-                            var points = { x1: this._parseNumber(), y1: this._parseNumber(), x2: this._parseNumber(), y2: this._parseNumber(), x: this._parseNumber(), y: this._parseNumber() };
-                            return new window.SVGPathSegCurvetoCubicAbs(owningPathSegList, points.x, points.y, points.x1, points.y1, points.x2, points.y2);
-                        case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_REL:
-                            var points = { x2: this._parseNumber(), y2: this._parseNumber(), x: this._parseNumber(), y: this._parseNumber() };
-                            return new window.SVGPathSegCurvetoCubicSmoothRel(owningPathSegList, points.x, points.y, points.x2, points.y2);
-                        case window.SVGPathSeg.PATHSEG_CURVETO_CUBIC_SMOOTH_ABS:
-                            var points = { x2: this._parseNumber(), y2: this._parseNumber(), x: this._parseNumber(), y: this._parseNumber() };
-                            return new window.SVGPathSegCurvetoCubicSmoothAbs(owningPathSegList, points.x, points.y, points.x2, points.y2);
-                        case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_REL:
-                            var points = { x1: this._parseNumber(), y1: this._parseNumber(), x: this._parseNumber(), y: this._parseNumber() };
-                            return new window.SVGPathSegCurvetoQuadraticRel(owningPathSegList, points.x, points.y, points.x1, points.y1);
-                        case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_ABS:
-                            var points = { x1: this._parseNumber(), y1: this._parseNumber(), x: this._parseNumber(), y: this._parseNumber() };
-                            return new window.SVGPathSegCurvetoQuadraticAbs(owningPathSegList, points.x, points.y, points.x1, points.y1);
-                        case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL:
-                            return new window.SVGPathSegCurvetoQuadraticSmoothRel(owningPathSegList, this._parseNumber(), this._parseNumber());
-                        case window.SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS:
-                            return new window.SVGPathSegCurvetoQuadraticSmoothAbs(owningPathSegList, this._parseNumber(), this._parseNumber());
-                        case window.SVGPathSeg.PATHSEG_ARC_REL:
-                            var points = { x1: this._parseNumber(), y1: this._parseNumber(), arcAngle: this._parseNumber(), arcLarge: this._parseArcFlag(), arcSweep: this._parseArcFlag(), x: this._parseNumber(), y: this._parseNumber() };
-                            return new window.SVGPathSegArcRel(owningPathSegList, points.x, points.y, points.x1, points.y1, points.arcAngle, points.arcLarge, points.arcSweep);
-                        case window.SVGPathSeg.PATHSEG_ARC_ABS:
-                            var points = { x1: this._parseNumber(), y1: this._parseNumber(), arcAngle: this._parseNumber(), arcLarge: this._parseArcFlag(), arcSweep: this._parseArcFlag(), x: this._parseNumber(), y: this._parseNumber() };
-                            return new window.SVGPathSegArcAbs(owningPathSegList, points.x, points.y, points.x1, points.y1, points.arcAngle, points.arcLarge, points.arcSweep);
-                        default:
-                            throw "Unknown path seg type.";
-                    }
-                };
-
-                var builder = new Builder();
-                var source = new Source(string);
-
-                if (!source.initialCommandIsMoveTo()) return [];
-                while (source.hasMoreData()) {
-                    var pathSeg = source.parseSegment();
-                    if (!pathSeg) return [];
-                    builder.appendSegment(pathSeg);
-                }
-
-                return builder.pathSegList;
-            };
-        }
-    })();
-
-    // String.padEnd polyfill for IE11
-    //
-    // https://github.com/uxitten/polyfill/blob/master/string.polyfill.js
-    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padEnd
-    if (!String.prototype.padEnd) {
-        String.prototype.padEnd = function padEnd(targetLength, padString) {
-            targetLength = targetLength >> 0; //floor if number or convert non-number to 0;
-            padString = String(typeof padString !== 'undefined' ? padString : ' ');
-            if (this.length > targetLength) {
-                return String(this);
-            } else {
-                targetLength = targetLength - this.length;
-                if (targetLength > padString.length) {
-                    padString += padString.repeat(targetLength / padString.length); //append to original to ensure we are longer than needed
-                }
-                return String(this) + padString.slice(0, targetLength);
-            }
-        };
-    }
-
-    /* jshint ignore:end */
-
-    c3_chart_fn.axis = function () {};
-    c3_chart_fn.axis.labels = function (labels) {
-        var $$ = this.internal;
-        if (arguments.length) {
-            Object.keys(labels).forEach(function (axisId) {
-                $$.axis.setLabelText(axisId, labels[axisId]);
-            });
-            $$.axis.updateLabels();
-        }
-        // TODO: return some values?
-    };
-    c3_chart_fn.axis.max = function (max) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (arguments.length) {
-            if ((typeof max === 'undefined' ? 'undefined' : _typeof(max)) === 'object') {
-                if (isValue(max.x)) {
-                    config.axis_x_max = max.x;
-                }
-                if (isValue(max.y)) {
-                    config.axis_y_max = max.y;
-                }
-                if (isValue(max.y2)) {
-                    config.axis_y2_max = max.y2;
-                }
-            } else {
-                config.axis_y_max = config.axis_y2_max = max;
-            }
-            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
-        } else {
-            return {
-                x: config.axis_x_max,
-                y: config.axis_y_max,
-                y2: config.axis_y2_max
-            };
-        }
-    };
-    c3_chart_fn.axis.min = function (min) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (arguments.length) {
-            if ((typeof min === 'undefined' ? 'undefined' : _typeof(min)) === 'object') {
-                if (isValue(min.x)) {
-                    config.axis_x_min = min.x;
-                }
-                if (isValue(min.y)) {
-                    config.axis_y_min = min.y;
-                }
-                if (isValue(min.y2)) {
-                    config.axis_y2_min = min.y2;
-                }
-            } else {
-                config.axis_y_min = config.axis_y2_min = min;
-            }
-            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
-        } else {
-            return {
-                x: config.axis_x_min,
-                y: config.axis_y_min,
-                y2: config.axis_y2_min
-            };
-        }
-    };
-    c3_chart_fn.axis.range = function (range) {
-        if (arguments.length) {
-            if (isDefined(range.max)) {
-                this.axis.max(range.max);
-            }
-            if (isDefined(range.min)) {
-                this.axis.min(range.min);
-            }
-        } else {
-            return {
-                max: this.axis.max(),
-                min: this.axis.min()
-            };
-        }
-    };
-
-    c3_chart_fn.category = function (i, category) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (arguments.length > 1) {
-            config.axis_x_categories[i] = category;
-            $$.redraw();
-        }
-        return config.axis_x_categories[i];
-    };
-    c3_chart_fn.categories = function (categories) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (!arguments.length) {
-            return config.axis_x_categories;
-        }
-        config.axis_x_categories = categories;
-        $$.redraw();
-        return config.axis_x_categories;
-    };
-
-    c3_chart_fn.resize = function (size) {
-        var $$ = this.internal,
-            config = $$.config;
-        config.size_width = size ? size.width : null;
-        config.size_height = size ? size.height : null;
-        this.flush();
-    };
-
-    c3_chart_fn.flush = function () {
-        var $$ = this.internal;
-        $$.updateAndRedraw({ withLegend: true, withTransition: false, withTransitionForTransform: false });
-    };
-
-    c3_chart_fn.destroy = function () {
-        var $$ = this.internal;
-
-        window.clearInterval($$.intervalForObserveInserted);
-
-        if ($$.resizeTimeout !== undefined) {
-            window.clearTimeout($$.resizeTimeout);
-        }
-
-        if (window.detachEvent) {
-            window.detachEvent('onresize', $$.resizeIfElementDisplayed);
-        } else if (window.removeEventListener) {
-            window.removeEventListener('resize', $$.resizeIfElementDisplayed);
-        } else {
-            var wrapper = window.onresize;
-            // check if no one else removed our wrapper and remove our resizeFunction from it
-            if (wrapper && wrapper.add && wrapper.remove) {
-                wrapper.remove($$.resizeFunction);
-            }
-        }
-
-        // remove the inner resize functions
-        $$.resizeFunction.remove();
-
-        $$.selectChart.classed('c3', false).html("");
-
-        // MEMO: this is needed because the reference of some elements will not be released, then memory leak will happen.
-        Object.keys($$).forEach(function (key) {
-            $$[key] = null;
-        });
-
-        return null;
-    };
-
-    // TODO: fix
-    c3_chart_fn.color = function (id) {
-        var $$ = this.internal;
-        return $$.color(id); // more patterns
-    };
-
-    c3_chart_fn.data = function (targetIds) {
-        var targets = this.internal.data.targets;
-        return typeof targetIds === 'undefined' ? targets : targets.filter(function (t) {
-            return [].concat(targetIds).indexOf(t.id) >= 0;
-        });
-    };
-    c3_chart_fn.data.shown = function (targetIds) {
-        return this.internal.filterTargetsToShow(this.data(targetIds));
-    };
-    c3_chart_fn.data.values = function (targetId) {
-        var targets,
-            values = null;
-        if (targetId) {
-            targets = this.data(targetId);
-            values = targets[0] ? targets[0].values.map(function (d) {
-                return d.value;
-            }) : null;
-        }
-        return values;
-    };
-    c3_chart_fn.data.names = function (names) {
-        this.internal.clearLegendItemTextBoxCache();
-        return this.internal.updateDataAttributes('names', names);
-    };
-    c3_chart_fn.data.colors = function (colors) {
-        return this.internal.updateDataAttributes('colors', colors);
-    };
-    c3_chart_fn.data.axes = function (axes) {
-        return this.internal.updateDataAttributes('axes', axes);
-    };
-
-    c3_chart_fn.flow = function (args) {
-        var $$ = this.internal,
-            targets,
-            data,
-            notfoundIds = [],
-            orgDataCount = $$.getMaxDataCount(),
-            dataCount,
-            domain,
-            baseTarget,
-            baseValue,
-            length = 0,
-            tail = 0,
-            diff,
-            to;
-
-        if (args.json) {
-            data = $$.convertJsonToData(args.json, args.keys);
-        } else if (args.rows) {
-            data = $$.convertRowsToData(args.rows);
-        } else if (args.columns) {
-            data = $$.convertColumnsToData(args.columns);
-        } else {
-            return;
-        }
-        targets = $$.convertDataToTargets(data, true);
-
-        // Update/Add data
-        $$.data.targets.forEach(function (t) {
-            var found = false,
-                i,
-                j;
-            for (i = 0; i < targets.length; i++) {
-                if (t.id === targets[i].id) {
-                    found = true;
-
-                    if (t.values[t.values.length - 1]) {
-                        tail = t.values[t.values.length - 1].index + 1;
-                    }
-                    length = targets[i].values.length;
-
-                    for (j = 0; j < length; j++) {
-                        targets[i].values[j].index = tail + j;
-                        if (!$$.isTimeSeries()) {
-                            targets[i].values[j].x = tail + j;
-                        }
-                    }
-                    t.values = t.values.concat(targets[i].values);
-
-                    targets.splice(i, 1);
-                    break;
-                }
-            }
-            if (!found) {
-                notfoundIds.push(t.id);
-            }
-        });
-
-        // Append null for not found targets
-        $$.data.targets.forEach(function (t) {
-            var i, j;
-            for (i = 0; i < notfoundIds.length; i++) {
-                if (t.id === notfoundIds[i]) {
-                    tail = t.values[t.values.length - 1].index + 1;
-                    for (j = 0; j < length; j++) {
-                        t.values.push({
-                            id: t.id,
-                            index: tail + j,
-                            x: $$.isTimeSeries() ? $$.getOtherTargetX(tail + j) : tail + j,
-                            value: null
-                        });
-                    }
-                }
-            }
-        });
-
-        // Generate null values for new target
-        if ($$.data.targets.length) {
-            targets.forEach(function (t) {
-                var i,
-                    missing = [];
-                for (i = $$.data.targets[0].values[0].index; i < tail; i++) {
-                    missing.push({
-                        id: t.id,
-                        index: i,
-                        x: $$.isTimeSeries() ? $$.getOtherTargetX(i) : i,
-                        value: null
-                    });
-                }
-                t.values.forEach(function (v) {
-                    v.index += tail;
-                    if (!$$.isTimeSeries()) {
-                        v.x += tail;
-                    }
-                });
-                t.values = missing.concat(t.values);
-            });
-        }
-        $$.data.targets = $$.data.targets.concat(targets); // add remained
-
-        // check data count because behavior needs to change when it's only one
-        dataCount = $$.getMaxDataCount();
-        baseTarget = $$.data.targets[0];
-        baseValue = baseTarget.values[0];
-
-        // Update length to flow if needed
-        if (isDefined(args.to)) {
-            length = 0;
-            to = $$.isTimeSeries() ? $$.parseDate(args.to) : args.to;
-            baseTarget.values.forEach(function (v) {
-                if (v.x < to) {
-                    length++;
-                }
-            });
-        } else if (isDefined(args.length)) {
-            length = args.length;
-        }
-
-        // If only one data, update the domain to flow from left edge of the chart
-        if (!orgDataCount) {
-            if ($$.isTimeSeries()) {
-                if (baseTarget.values.length > 1) {
-                    diff = baseTarget.values[baseTarget.values.length - 1].x - baseValue.x;
-                } else {
-                    diff = baseValue.x - $$.getXDomain($$.data.targets)[0];
-                }
-            } else {
-                diff = 1;
-            }
-            domain = [baseValue.x - diff, baseValue.x];
-            $$.updateXDomain(null, true, true, false, domain);
-        } else if (orgDataCount === 1) {
-            if ($$.isTimeSeries()) {
-                diff = (baseTarget.values[baseTarget.values.length - 1].x - baseValue.x) / 2;
-                domain = [new Date(+baseValue.x - diff), new Date(+baseValue.x + diff)];
-                $$.updateXDomain(null, true, true, false, domain);
-            }
-        }
-
-        // Set targets
-        $$.updateTargets($$.data.targets);
-
-        // Redraw with new targets
-        $$.redraw({
-            flow: {
-                index: baseValue.index,
-                length: length,
-                duration: isValue(args.duration) ? args.duration : $$.config.transition_duration,
-                done: args.done,
-                orgDataCount: orgDataCount
-            },
-            withLegend: true,
-            withTransition: orgDataCount > 1,
-            withTrimXDomain: false,
-            withUpdateXAxis: true
-        });
-    };
-
-    c3_chart_internal_fn.generateFlow = function (args) {
-        var $$ = this,
-            config = $$.config,
-            d3 = $$.d3;
-
-        return function () {
-            var targets = args.targets,
-                flow = args.flow,
-                drawBar = args.drawBar,
-                drawLine = args.drawLine,
-                drawArea = args.drawArea,
-                cx = args.cx,
-                cy = args.cy,
-                xv = args.xv,
-                xForText = args.xForText,
-                yForText = args.yForText,
-                duration = args.duration;
-
-            var translateX,
-                scaleX = 1,
-                transform,
-                flowIndex = flow.index,
-                flowLength = flow.length,
-                flowStart = $$.getValueOnIndex($$.data.targets[0].values, flowIndex),
-                flowEnd = $$.getValueOnIndex($$.data.targets[0].values, flowIndex + flowLength),
-                orgDomain = $$.x.domain(),
-                domain,
-                durationForFlow = flow.duration || duration,
-                done = flow.done || function () {},
-                wait = $$.generateWait();
-
-            var xgrid, xgridLines, mainRegion, mainText, mainBar, mainLine, mainArea, mainCircle;
-
-            // set flag
-            $$.flowing = true;
-
-            // remove head data after rendered
-            $$.data.targets.forEach(function (d) {
-                d.values.splice(0, flowLength);
-            });
-
-            // update x domain to generate axis elements for flow
-            domain = $$.updateXDomain(targets, true, true);
-            // update elements related to x scale
-            if ($$.updateXGrid) {
-                $$.updateXGrid(true);
-            }
-
-            xgrid = $$.xgrid || d3.selectAll([]); // xgrid needs to be obtained after updateXGrid
-            xgridLines = $$.xgridLines || d3.selectAll([]);
-            mainRegion = $$.mainRegion || d3.selectAll([]);
-            mainText = $$.mainText || d3.selectAll([]);
-            mainBar = $$.mainBar || d3.selectAll([]);
-            mainLine = $$.mainLine || d3.selectAll([]);
-            mainArea = $$.mainArea || d3.selectAll([]);
-            mainCircle = $$.mainCircle || d3.selectAll([]);
-
-            // generate transform to flow
-            if (!flow.orgDataCount) {
-                // if empty
-                if ($$.data.targets[0].values.length !== 1) {
-                    translateX = $$.x(orgDomain[0]) - $$.x(domain[0]);
-                } else {
-                    if ($$.isTimeSeries()) {
-                        flowStart = $$.getValueOnIndex($$.data.targets[0].values, 0);
-                        flowEnd = $$.getValueOnIndex($$.data.targets[0].values, $$.data.targets[0].values.length - 1);
-                        translateX = $$.x(flowStart.x) - $$.x(flowEnd.x);
-                    } else {
-                        translateX = diffDomain(domain) / 2;
-                    }
-                }
-            } else if (flow.orgDataCount === 1 || (flowStart && flowStart.x) === (flowEnd && flowEnd.x)) {
-                translateX = $$.x(orgDomain[0]) - $$.x(domain[0]);
-            } else {
-                if ($$.isTimeSeries()) {
-                    translateX = $$.x(orgDomain[0]) - $$.x(domain[0]);
-                } else {
-                    translateX = $$.x(flowStart.x) - $$.x(flowEnd.x);
-                }
-            }
-            scaleX = diffDomain(orgDomain) / diffDomain(domain);
-            transform = 'translate(' + translateX + ',0) scale(' + scaleX + ',1)';
-
-            $$.hideXGridFocus();
-
-            var flowTransition = d3.transition().ease(d3.easeLinear).duration(durationForFlow);
-            wait.add($$.xAxis($$.axes.x, flowTransition));
-            wait.add(mainBar.transition(flowTransition).attr('transform', transform));
-            wait.add(mainLine.transition(flowTransition).attr('transform', transform));
-            wait.add(mainArea.transition(flowTransition).attr('transform', transform));
-            wait.add(mainCircle.transition(flowTransition).attr('transform', transform));
-            wait.add(mainText.transition(flowTransition).attr('transform', transform));
-            wait.add(mainRegion.filter($$.isRegionOnX).transition(flowTransition).attr('transform', transform));
-            wait.add(xgrid.transition(flowTransition).attr('transform', transform));
-            wait.add(xgridLines.transition(flowTransition).attr('transform', transform));
-            wait(function () {
-                var i,
-                    shapes = [],
-                    texts = [];
-
-                // remove flowed elements
-                if (flowLength) {
-                    for (i = 0; i < flowLength; i++) {
-                        shapes.push('.' + CLASS.shape + '-' + (flowIndex + i));
-                        texts.push('.' + CLASS.text + '-' + (flowIndex + i));
-                    }
-                    $$.svg.selectAll('.' + CLASS.shapes).selectAll(shapes).remove();
-                    $$.svg.selectAll('.' + CLASS.texts).selectAll(texts).remove();
-                    $$.svg.select('.' + CLASS.xgrid).remove();
-                }
-
-                // draw again for removing flowed elements and reverting attr
-                xgrid.attr('transform', null).attr('x1', $$.xgridAttr.x1).attr('x2', $$.xgridAttr.x2).attr('y1', $$.xgridAttr.y1).attr('y2', $$.xgridAttr.y2).style("opacity", $$.xgridAttr.opacity);
-                xgridLines.attr('transform', null);
-                xgridLines.select('line').attr("x1", config.axis_rotated ? 0 : xv).attr("x2", config.axis_rotated ? $$.width : xv);
-                xgridLines.select('text').attr("x", config.axis_rotated ? $$.width : 0).attr("y", xv);
-                mainBar.attr('transform', null).attr("d", drawBar);
-                mainLine.attr('transform', null).attr("d", drawLine);
-                mainArea.attr('transform', null).attr("d", drawArea);
-                mainCircle.attr('transform', null).attr("cx", cx).attr("cy", cy);
-                mainText.attr('transform', null).attr('x', xForText).attr('y', yForText).style('fill-opacity', $$.opacityForText.bind($$));
-                mainRegion.attr('transform', null);
-                mainRegion.filter($$.isRegionOnX).attr("x", $$.regionX.bind($$)).attr("width", $$.regionWidth.bind($$));
-
-                // callback for end of flow
-                done();
-
-                $$.flowing = false;
-            });
-        };
-    };
-
-    c3_chart_fn.focus = function (targetIds) {
-        var $$ = this.internal,
-            candidates;
-
-        targetIds = $$.mapToTargetIds(targetIds);
-        candidates = $$.svg.selectAll($$.selectorTargets(targetIds.filter($$.isTargetToShow, $$))), this.revert();
-        this.defocus();
-        candidates.classed(CLASS.focused, true).classed(CLASS.defocused, false);
-        if ($$.hasArcType()) {
-            $$.expandArc(targetIds);
-        }
-        $$.toggleFocusLegend(targetIds, true);
-
-        $$.focusedTargetIds = targetIds;
-        $$.defocusedTargetIds = $$.defocusedTargetIds.filter(function (id) {
-            return targetIds.indexOf(id) < 0;
-        });
-    };
-
-    c3_chart_fn.defocus = function (targetIds) {
-        var $$ = this.internal,
-            candidates;
-
-        targetIds = $$.mapToTargetIds(targetIds);
-        candidates = $$.svg.selectAll($$.selectorTargets(targetIds.filter($$.isTargetToShow, $$))), candidates.classed(CLASS.focused, false).classed(CLASS.defocused, true);
-        if ($$.hasArcType()) {
-            $$.unexpandArc(targetIds);
-        }
-        $$.toggleFocusLegend(targetIds, false);
-
-        $$.focusedTargetIds = $$.focusedTargetIds.filter(function (id) {
-            return targetIds.indexOf(id) < 0;
-        });
-        $$.defocusedTargetIds = targetIds;
-    };
-
-    c3_chart_fn.revert = function (targetIds) {
-        var $$ = this.internal,
-            candidates;
-
-        targetIds = $$.mapToTargetIds(targetIds);
-        candidates = $$.svg.selectAll($$.selectorTargets(targetIds)); // should be for all targets
-
-        candidates.classed(CLASS.focused, false).classed(CLASS.defocused, false);
-        if ($$.hasArcType()) {
-            $$.unexpandArc(targetIds);
-        }
-        if ($$.config.legend_show) {
-            $$.showLegend(targetIds.filter($$.isLegendToShow.bind($$)));
-            $$.legend.selectAll($$.selectorLegends(targetIds)).filter(function () {
-                return $$.d3.select(this).classed(CLASS.legendItemFocused);
-            }).classed(CLASS.legendItemFocused, false);
-        }
-
-        $$.focusedTargetIds = [];
-        $$.defocusedTargetIds = [];
-    };
-
-    c3_chart_fn.xgrids = function (grids) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (!grids) {
-            return config.grid_x_lines;
-        }
-        config.grid_x_lines = grids;
-        $$.redrawWithoutRescale();
-        return config.grid_x_lines;
-    };
-    c3_chart_fn.xgrids.add = function (grids) {
-        var $$ = this.internal;
-        return this.xgrids($$.config.grid_x_lines.concat(grids ? grids : []));
-    };
-    c3_chart_fn.xgrids.remove = function (params) {
-        // TODO: multiple
-        var $$ = this.internal;
-        $$.removeGridLines(params, true);
-    };
-
-    c3_chart_fn.ygrids = function (grids) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (!grids) {
-            return config.grid_y_lines;
-        }
-        config.grid_y_lines = grids;
-        $$.redrawWithoutRescale();
-        return config.grid_y_lines;
-    };
-    c3_chart_fn.ygrids.add = function (grids) {
-        var $$ = this.internal;
-        return this.ygrids($$.config.grid_y_lines.concat(grids ? grids : []));
-    };
-    c3_chart_fn.ygrids.remove = function (params) {
-        // TODO: multiple
-        var $$ = this.internal;
-        $$.removeGridLines(params, false);
-    };
-
-    c3_chart_fn.groups = function (groups) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (isUndefined(groups)) {
-            return config.data_groups;
-        }
-        config.data_groups = groups;
-        $$.redraw();
-        return config.data_groups;
-    };
-
-    c3_chart_fn.legend = function () {};
-    c3_chart_fn.legend.show = function (targetIds) {
-        var $$ = this.internal;
-        $$.showLegend($$.mapToTargetIds(targetIds));
-        $$.updateAndRedraw({ withLegend: true });
-    };
-    c3_chart_fn.legend.hide = function (targetIds) {
-        var $$ = this.internal;
-        $$.hideLegend($$.mapToTargetIds(targetIds));
-        $$.updateAndRedraw({ withLegend: true });
-    };
-
-    c3_chart_fn.load = function (args) {
-        var $$ = this.internal,
-            config = $$.config;
-        // update xs if specified
-        if (args.xs) {
-            $$.addXs(args.xs);
-        }
-        // update names if exists
-        if ('names' in args) {
-            c3_chart_fn.data.names.bind(this)(args.names);
-        }
-        // update classes if exists
-        if ('classes' in args) {
-            Object.keys(args.classes).forEach(function (id) {
-                config.data_classes[id] = args.classes[id];
-            });
-        }
-        // update categories if exists
-        if ('categories' in args && $$.isCategorized()) {
-            config.axis_x_categories = args.categories;
-        }
-        // update axes if exists
-        if ('axes' in args) {
-            Object.keys(args.axes).forEach(function (id) {
-                config.data_axes[id] = args.axes[id];
-            });
-        }
-        // update colors if exists
-        if ('colors' in args) {
-            Object.keys(args.colors).forEach(function (id) {
-                config.data_colors[id] = args.colors[id];
-            });
-        }
-        // use cache if exists
-        if ('cacheIds' in args && $$.hasCaches(args.cacheIds)) {
-            $$.load($$.getCaches(args.cacheIds), args.done);
-            return;
-        }
-        // unload if needed
-        if ('unload' in args) {
-            // TODO: do not unload if target will load (included in url/rows/columns)
-            $$.unload($$.mapToTargetIds(typeof args.unload === 'boolean' && args.unload ? null : args.unload), function () {
-                $$.loadFromArgs(args);
-            });
-        } else {
-            $$.loadFromArgs(args);
-        }
-    };
-
-    c3_chart_fn.unload = function (args) {
-        var $$ = this.internal;
-        args = args || {};
-        if (args instanceof Array) {
-            args = { ids: args };
-        } else if (typeof args === 'string') {
-            args = { ids: [args] };
-        }
-        $$.unload($$.mapToTargetIds(args.ids), function () {
-            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
-            if (args.done) {
-                args.done();
-            }
-        });
-    };
-
-    c3_chart_fn.regions = function (regions) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (!regions) {
-            return config.regions;
-        }
-        config.regions = regions;
-        $$.redrawWithoutRescale();
-        return config.regions;
-    };
-    c3_chart_fn.regions.add = function (regions) {
-        var $$ = this.internal,
-            config = $$.config;
-        if (!regions) {
-            return config.regions;
-        }
-        config.regions = config.regions.concat(regions);
-        $$.redrawWithoutRescale();
-        return config.regions;
-    };
-    c3_chart_fn.regions.remove = function (options) {
-        var $$ = this.internal,
-            config = $$.config,
-            duration,
-            classes,
-            regions;
-
-        options = options || {};
-        duration = $$.getOption(options, "duration", config.transition_duration);
-        classes = $$.getOption(options, "classes", [CLASS.region]);
-
-        regions = $$.main.select('.' + CLASS.regions).selectAll(classes.map(function (c) {
-            return '.' + c;
-        }));
-        (duration ? regions.transition().duration(duration) : regions).style('opacity', 0).remove();
-
-        config.regions = config.regions.filter(function (region) {
-            var found = false;
-            if (!region['class']) {
-                return true;
-            }
-            region['class'].split(' ').forEach(function (c) {
-                if (classes.indexOf(c) >= 0) {
-                    found = true;
-                }
-            });
-            return !found;
-        });
-
-        return config.regions;
-    };
-
-    c3_chart_fn.selected = function (targetId) {
-        var $$ = this.internal,
-            d3 = $$.d3;
-        return d3.merge($$.main.selectAll('.' + CLASS.shapes + $$.getTargetSelectorSuffix(targetId)).selectAll('.' + CLASS.shape).filter(function () {
-            return d3.select(this).classed(CLASS.SELECTED);
-        }).map(function (d) {
-            return d.map(function (d) {
-                var data = d.__data__;return data.data ? data.data : data;
-            });
-        }));
-    };
-    c3_chart_fn.select = function (ids, indices, resetOther) {
-        var $$ = this.internal,
-            d3 = $$.d3,
-            config = $$.config;
-        if (!config.data_selection_enabled) {
-            return;
-        }
-        $$.main.selectAll('.' + CLASS.shapes).selectAll('.' + CLASS.shape).each(function (d, i) {
-            var shape = d3.select(this),
-                id = d.data ? d.data.id : d.id,
-                toggle = $$.getToggle(this, d).bind($$),
-                isTargetId = config.data_selection_grouped || !ids || ids.indexOf(id) >= 0,
-                isTargetIndex = !indices || indices.indexOf(i) >= 0,
-                isSelected = shape.classed(CLASS.SELECTED);
-            // line/area selection not supported yet
-            if (shape.classed(CLASS.line) || shape.classed(CLASS.area)) {
-                return;
-            }
-            if (isTargetId && isTargetIndex) {
-                if (config.data_selection_isselectable(d) && !isSelected) {
-                    toggle(true, shape.classed(CLASS.SELECTED, true), d, i);
-                }
-            } else if (isDefined(resetOther) && resetOther) {
-                if (isSelected) {
-                    toggle(false, shape.classed(CLASS.SELECTED, false), d, i);
-                }
-            }
-        });
-    };
-    c3_chart_fn.unselect = function (ids, indices) {
-        var $$ = this.internal,
-            d3 = $$.d3,
-            config = $$.config;
-        if (!config.data_selection_enabled) {
-            return;
-        }
-        $$.main.selectAll('.' + CLASS.shapes).selectAll('.' + CLASS.shape).each(function (d, i) {
-            var shape = d3.select(this),
-                id = d.data ? d.data.id : d.id,
-                toggle = $$.getToggle(this, d).bind($$),
-                isTargetId = config.data_selection_grouped || !ids || ids.indexOf(id) >= 0,
-                isTargetIndex = !indices || indices.indexOf(i) >= 0,
-                isSelected = shape.classed(CLASS.SELECTED);
-            // line/area selection not supported yet
-            if (shape.classed(CLASS.line) || shape.classed(CLASS.area)) {
-                return;
-            }
-            if (isTargetId && isTargetIndex) {
-                if (config.data_selection_isselectable(d)) {
-                    if (isSelected) {
-                        toggle(false, shape.classed(CLASS.SELECTED, false), d, i);
-                    }
-                }
-            }
-        });
-    };
-
-    c3_chart_fn.show = function (targetIds, options) {
-        var $$ = this.internal,
-            targets;
-
-        targetIds = $$.mapToTargetIds(targetIds);
-        options = options || {};
-
-        $$.removeHiddenTargetIds(targetIds);
-        targets = $$.svg.selectAll($$.selectorTargets(targetIds));
-
-        targets.transition().style('display', 'initial', 'important').style('opacity', 1, 'important').call($$.endall, function () {
-            targets.style('opacity', null).style('opacity', 1);
-        });
-
-        if (options.withLegend) {
-            $$.showLegend(targetIds);
-        }
-
-        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
-    };
-
-    c3_chart_fn.hide = function (targetIds, options) {
-        var $$ = this.internal,
-            targets;
-
-        targetIds = $$.mapToTargetIds(targetIds);
-        options = options || {};
-
-        $$.addHiddenTargetIds(targetIds);
-        targets = $$.svg.selectAll($$.selectorTargets(targetIds));
-
-        targets.transition().style('opacity', 0, 'important').call($$.endall, function () {
-            targets.style('opacity', null).style('opacity', 0);
-            targets.style('display', 'none');
-        });
-
-        if (options.withLegend) {
-            $$.hideLegend(targetIds);
-        }
-
-        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
-    };
-
-    c3_chart_fn.toggle = function (targetIds, options) {
-        var that = this,
-            $$ = this.internal;
-        $$.mapToTargetIds(targetIds).forEach(function (targetId) {
-            $$.isTargetToShow(targetId) ? that.hide(targetId, options) : that.show(targetId, options);
-        });
-    };
-
-    c3_chart_fn.tooltip = function () {};
-    c3_chart_fn.tooltip.show = function (args) {
-        var $$ = this.internal,
-            targets,
-            data,
-            mouse = {};
-
-        // determine mouse position on the chart
-        if (args.mouse) {
-            mouse = args.mouse;
-        } else {
-            // determine focus data
-            if (args.data) {
-                data = args.data;
-            } else if (typeof args.x !== 'undefined') {
-                if (args.id) {
-                    targets = $$.data.targets.filter(function (t) {
-                        return t.id === args.id;
-                    });
-                } else {
-                    targets = $$.data.targets;
-                }
-                data = $$.filterByX(targets, args.x).slice(0, 1)[0];
-            }
-            mouse = data ? $$.getMousePosition(data) : null;
-        }
-
-        // emulate mouse events to show
-        $$.dispatchEvent('mousemove', mouse);
-
-        $$.config.tooltip_onshow.call($$, data);
-    };
-    c3_chart_fn.tooltip.hide = function () {
-        // TODO: get target data by checking the state of focus
-        this.internal.dispatchEvent('mouseout', 0);
-
-        this.internal.config.tooltip_onhide.call(this);
-    };
-
-    c3_chart_fn.transform = function (type, targetIds) {
-        var $$ = this.internal,
-            options = ['pie', 'donut'].indexOf(type) >= 0 ? { withTransform: true } : null;
-        $$.transformTo(targetIds, type, options);
-    };
-
-    c3_chart_internal_fn.transformTo = function (targetIds, type, optionsForRedraw) {
-        var $$ = this,
-            withTransitionForAxis = !$$.hasArcType(),
-            options = optionsForRedraw || { withTransitionForAxis: withTransitionForAxis };
-        options.withTransitionForTransform = false;
-        $$.transiting = false;
-        $$.setTargetType(targetIds, type);
-        $$.updateTargets($$.data.targets); // this is needed when transforming to arc
-        $$.updateAndRedraw(options);
-    };
-
-    c3_chart_fn.x = function (x) {
-        var $$ = this.internal;
-        if (arguments.length) {
-            $$.updateTargetX($$.data.targets, x);
-            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
-        }
-        return $$.data.xs;
-    };
-    c3_chart_fn.xs = function (xs) {
-        var $$ = this.internal;
-        if (arguments.length) {
-            $$.updateTargetXs($$.data.targets, xs);
-            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
-        }
-        return $$.data.xs;
-    };
-
-    c3_chart_fn.zoom = function (domain) {
-        var $$ = this.internal;
-        if (domain) {
-            if ($$.isTimeSeries()) {
-                domain = domain.map(function (x) {
-                    return $$.parseDate(x);
-                });
-            }
-            if ($$.config.subchart_show) {
-                $$.brush.selectionAsValue(domain, true);
-            } else {
-                $$.updateXDomain(null, true, false, false, domain);
-                $$.redraw({ withY: $$.config.zoom_rescale, withSubchart: false });
-            }
-            $$.config.zoom_onzoom.call(this, $$.x.orgDomain());
-            return domain;
-        } else {
-            return $$.x.domain();
-        }
-    };
-    c3_chart_fn.zoom.enable = function (enabled) {
-        var $$ = this.internal;
-        $$.config.zoom_enabled = enabled;
-        $$.updateAndRedraw();
-    };
-    c3_chart_fn.unzoom = function () {
-        var $$ = this.internal;
-        if ($$.config.subchart_show) {
-            $$.brush.clear();
-        } else {
-            $$.updateXDomain(null, true, false, false, $$.subX.domain());
-            $$.redraw({ withY: $$.config.zoom_rescale, withSubchart: false });
-        }
-    };
-
-    c3_chart_fn.zoom.max = function (max) {
-        var $$ = this.internal,
-            config = $$.config,
-            d3 = $$.d3;
-        if (max === 0 || max) {
-            config.zoom_x_max = d3.max([$$.orgXDomain[1], max]);
-        } else {
-            return config.zoom_x_max;
-        }
-    };
-
-    c3_chart_fn.zoom.min = function (min) {
-        var $$ = this.internal,
-            config = $$.config,
-            d3 = $$.d3;
-        if (min === 0 || min) {
-            config.zoom_x_min = d3.min([$$.orgXDomain[0], min]);
-        } else {
-            return config.zoom_x_min;
-        }
-    };
-
-    c3_chart_fn.zoom.range = function (range) {
-        if (arguments.length) {
-            if (isDefined(range.max)) {
-                this.domain.max(range.max);
-            }
-            if (isDefined(range.min)) {
-                this.domain.min(range.min);
-            }
-        } else {
-            return {
-                max: this.domain.max(),
-                min: this.domain.min()
-            };
-        }
-    };
-
-    c3_chart_internal_fn.initPie = function () {
-        var $$ = this,
-            d3 = $$.d3;
-        $$.pie = d3.pie().value(function (d) {
-            return d.values.reduce(function (a, b) {
-                return a + b.value;
-            }, 0);
-        });
-
-        var orderFct = $$.getOrderFunction();
-
-        // we need to reverse the returned order if asc or desc to have the slice in expected order.
-        if (orderFct && ($$.isOrderAsc() || $$.isOrderDesc())) {
-            var defaultSort = orderFct;
-            orderFct = function orderFct(t1, t2) {
-                return defaultSort(t1, t2) * -1;
-            };
-        }
-
-        $$.pie.sort(orderFct || null);
-    };
-
-    c3_chart_internal_fn.updateRadius = function () {
-        var $$ = this,
-            config = $$.config,
-            w = config.gauge_width || config.donut_width,
-            gaugeArcWidth = $$.filterTargetsToShow($$.data.targets).length * $$.config.gauge_arcs_minWidth;
-        $$.radiusExpanded = Math.min($$.arcWidth, $$.arcHeight) / 2 * ($$.hasType('gauge') ? 0.85 : 1);
-        $$.radius = $$.radiusExpanded * 0.95;
-        $$.innerRadiusRatio = w ? ($$.radius - w) / $$.radius : 0.6;
-        $$.innerRadius = $$.hasType('donut') || $$.hasType('gauge') ? $$.radius * $$.innerRadiusRatio : 0;
-        $$.gaugeArcWidth = w ? w : gaugeArcWidth <= $$.radius - $$.innerRadius ? $$.radius - $$.innerRadius : gaugeArcWidth <= $$.radius ? gaugeArcWidth : $$.radius;
-    };
-
-    c3_chart_internal_fn.updateArc = function () {
-        var $$ = this;
-        $$.svgArc = $$.getSvgArc();
-        $$.svgArcExpanded = $$.getSvgArcExpanded();
-        $$.svgArcExpandedSub = $$.getSvgArcExpanded(0.98);
-    };
-
-    c3_chart_internal_fn.updateAngle = function (d) {
-        var $$ = this,
-            config = $$.config,
-            found = false,
-            index = 0,
-            gMin,
-            gMax,
-            gTic,
-            gValue;
-
-        if (!config) {
-            return null;
-        }
-
-        $$.pie($$.filterTargetsToShow($$.data.targets)).forEach(function (t) {
-            if (!found && t.data.id === d.data.id) {
-                found = true;
-                d = t;
-                d.index = index;
-            }
-            index++;
-        });
-        if (isNaN(d.startAngle)) {
-            d.startAngle = 0;
-        }
-        if (isNaN(d.endAngle)) {
-            d.endAngle = d.startAngle;
-        }
-        if ($$.isGaugeType(d.data)) {
-            gMin = config.gauge_min;
-            gMax = config.gauge_max;
-            gTic = Math.PI * (config.gauge_fullCircle ? 2 : 1) / (gMax - gMin);
-            gValue = d.value < gMin ? 0 : d.value < gMax ? d.value - gMin : gMax - gMin;
-            d.startAngle = config.gauge_startingAngle;
-            d.endAngle = d.startAngle + gTic * gValue;
-        }
-        return found ? d : null;
-    };
-
-    c3_chart_internal_fn.getSvgArc = function () {
-        var $$ = this,
-            hasGaugeType = $$.hasType('gauge'),
-            singleArcWidth = $$.gaugeArcWidth / $$.filterTargetsToShow($$.data.targets).length,
-            arc = $$.d3.arc().outerRadius(function (d) {
-            return hasGaugeType ? $$.radius - singleArcWidth * d.index : $$.radius;
-        }).innerRadius(function (d) {
-            return hasGaugeType ? $$.radius - singleArcWidth * (d.index + 1) : $$.innerRadius;
-        }),
-            newArc = function newArc(d, withoutUpdate) {
-            var updated;
-            if (withoutUpdate) {
-                return arc(d);
-            } // for interpolate
-            updated = $$.updateAngle(d);
-            return updated ? arc(updated) : "M 0 0";
-        };
-        // TODO: extends all function
-        newArc.centroid = arc.centroid;
-        return newArc;
-    };
-
-    c3_chart_internal_fn.getSvgArcExpanded = function (rate) {
-        rate = rate || 1;
-        var $$ = this,
-            hasGaugeType = $$.hasType('gauge'),
-            singleArcWidth = $$.gaugeArcWidth / $$.filterTargetsToShow($$.data.targets).length,
-            expandWidth = Math.min($$.radiusExpanded * rate - $$.radius, singleArcWidth * 0.8 - (1 - rate) * 100),
-            arc = $$.d3.arc().outerRadius(function (d) {
-            return hasGaugeType ? $$.radius - singleArcWidth * d.index + expandWidth : $$.radiusExpanded * rate;
-        }).innerRadius(function (d) {
-            return hasGaugeType ? $$.radius - singleArcWidth * (d.index + 1) : $$.innerRadius;
-        });
-        return function (d) {
-            var updated = $$.updateAngle(d);
-            return updated ? arc(updated) : "M 0 0";
-        };
-    };
-
-    c3_chart_internal_fn.getArc = function (d, withoutUpdate, force) {
-        return force || this.isArcType(d.data) ? this.svgArc(d, withoutUpdate) : "M 0 0";
-    };
-
-    c3_chart_internal_fn.transformForArcLabel = function (d) {
-        var $$ = this,
-            config = $$.config,
-            updated = $$.updateAngle(d),
-            c,
-            x,
-            y,
-            h,
-            ratio,
-            translate = "",
-            hasGauge = $$.hasType('gauge');
-        if (updated && !hasGauge) {
-            c = this.svgArc.centroid(updated);
-            x = isNaN(c[0]) ? 0 : c[0];
-            y = isNaN(c[1]) ? 0 : c[1];
-            h = Math.sqrt(x * x + y * y);
-            if ($$.hasType('donut') && config.donut_label_ratio) {
-                ratio = isFunction(config.donut_label_ratio) ? config.donut_label_ratio(d, $$.radius, h) : config.donut_label_ratio;
-            } else if ($$.hasType('pie') && config.pie_label_ratio) {
-                ratio = isFunction(config.pie_label_ratio) ? config.pie_label_ratio(d, $$.radius, h) : config.pie_label_ratio;
-            } else {
-                ratio = $$.radius && h ? (36 / $$.radius > 0.375 ? 1.175 - 36 / $$.radius : 0.8) * $$.radius / h : 0;
-            }
-            translate = "translate(" + x * ratio + ',' + y * ratio + ")";
-        } else if (updated && hasGauge && $$.filterTargetsToShow($$.data.targets).length > 1) {
-            var y1 = Math.sin(updated.endAngle - Math.PI / 2);
-            x = Math.cos(updated.endAngle - Math.PI / 2) * ($$.radiusExpanded + 25);
-            y = y1 * ($$.radiusExpanded + 15 - Math.abs(y1 * 10)) + 3;
-            translate = "translate(" + x + ',' + y + ")";
-        }
-        return translate;
-    };
-
-    c3_chart_internal_fn.getArcRatio = function (d) {
-        var $$ = this,
-            config = $$.config,
-            whole = Math.PI * ($$.hasType('gauge') && !config.gauge_fullCircle ? 1 : 2);
-        return d ? (d.endAngle - d.startAngle) / whole : null;
-    };
-
-    c3_chart_internal_fn.convertToArcData = function (d) {
-        return this.addName({
-            id: d.data.id,
-            value: d.value,
-            ratio: this.getArcRatio(d),
-            index: d.index
-        });
-    };
-
-    c3_chart_internal_fn.textForArcLabel = function (d) {
-        var $$ = this,
-            updated,
-            value,
-            ratio,
-            id,
-            format;
-        if (!$$.shouldShowArcLabel()) {
-            return "";
-        }
-        updated = $$.updateAngle(d);
-        value = updated ? updated.value : null;
-        ratio = $$.getArcRatio(updated);
-        id = d.data.id;
-        if (!$$.hasType('gauge') && !$$.meetsArcLabelThreshold(ratio)) {
-            return "";
-        }
-        format = $$.getArcLabelFormat();
-        return format ? format(value, ratio, id) : $$.defaultArcValueFormat(value, ratio);
-    };
-
-    c3_chart_internal_fn.textForGaugeMinMax = function (value, isMax) {
-        var $$ = this,
-            format = $$.getGaugeLabelExtents();
-
-        return format ? format(value, isMax) : value;
-    };
-
-    c3_chart_internal_fn.expandArc = function (targetIds) {
-        var $$ = this,
-            interval;
-
-        // MEMO: avoid to cancel transition
-        if ($$.transiting) {
-            interval = window.setInterval(function () {
-                if (!$$.transiting) {
-                    window.clearInterval(interval);
-                    if ($$.legend.selectAll('.c3-legend-item-focused').size() > 0) {
-                        $$.expandArc(targetIds);
-                    }
-                }
-            }, 10);
-            return;
-        }
-
-        targetIds = $$.mapToTargetIds(targetIds);
-
-        $$.svg.selectAll($$.selectorTargets(targetIds, '.' + CLASS.chartArc)).each(function (d) {
-            if (!$$.shouldExpand(d.data.id)) {
-                return;
-            }
-            $$.d3.select(this).selectAll('path').transition().duration($$.expandDuration(d.data.id)).attr("d", $$.svgArcExpanded).transition().duration($$.expandDuration(d.data.id) * 2).attr("d", $$.svgArcExpandedSub).each(function (d) {
-                if ($$.isDonutType(d.data)) {
-                    // callback here
-                }
-            });
-        });
-    };
-
-    c3_chart_internal_fn.unexpandArc = function (targetIds) {
-        var $$ = this;
-
-        if ($$.transiting) {
-            return;
-        }
-
-        targetIds = $$.mapToTargetIds(targetIds);
-
-        $$.svg.selectAll($$.selectorTargets(targetIds, '.' + CLASS.chartArc)).selectAll('path').transition().duration(function (d) {
-            return $$.expandDuration(d.data.id);
-        }).attr("d", $$.svgArc);
-        $$.svg.selectAll('.' + CLASS.arc);
-    };
-
-    c3_chart_internal_fn.expandDuration = function (id) {
-        var $$ = this,
-            config = $$.config;
-
-        if ($$.isDonutType(id)) {
-            return config.donut_expand_duration;
-        } else if ($$.isGaugeType(id)) {
-            return config.gauge_expand_duration;
-        } else if ($$.isPieType(id)) {
-            return config.pie_expand_duration;
-        } else {
-            return 50;
-        }
-    };
-
-    c3_chart_internal_fn.shouldExpand = function (id) {
-        var $$ = this,
-            config = $$.config;
-        return $$.isDonutType(id) && config.donut_expand || $$.isGaugeType(id) && config.gauge_expand || $$.isPieType(id) && config.pie_expand;
-    };
-
-    c3_chart_internal_fn.shouldShowArcLabel = function () {
-        var $$ = this,
-            config = $$.config,
-            shouldShow = true;
-        if ($$.hasType('donut')) {
-            shouldShow = config.donut_label_show;
-        } else if ($$.hasType('pie')) {
-            shouldShow = config.pie_label_show;
-        }
-        // when gauge, always true
-        return shouldShow;
-    };
-
-    c3_chart_internal_fn.meetsArcLabelThreshold = function (ratio) {
-        var $$ = this,
-            config = $$.config,
-            threshold = $$.hasType('donut') ? config.donut_label_threshold : config.pie_label_threshold;
-        return ratio >= threshold;
-    };
-
-    c3_chart_internal_fn.getArcLabelFormat = function () {
-        var $$ = this,
-            config = $$.config,
-            format = config.pie_label_format;
-        if ($$.hasType('gauge')) {
-            format = config.gauge_label_format;
-        } else if ($$.hasType('donut')) {
-            format = config.donut_label_format;
-        }
-        return format;
-    };
-
-    c3_chart_internal_fn.getGaugeLabelExtents = function () {
-        var $$ = this,
-            config = $$.config;
-        return config.gauge_label_extents;
-    };
-
-    c3_chart_internal_fn.getArcTitle = function () {
-        var $$ = this;
-        return $$.hasType('donut') ? $$.config.donut_title : "";
-    };
-
-    c3_chart_internal_fn.updateTargetsForArc = function (targets) {
-        var $$ = this,
-            main = $$.main,
-            mainPies,
-            mainPieEnter,
-            classChartArc = $$.classChartArc.bind($$),
-            classArcs = $$.classArcs.bind($$),
-            classFocus = $$.classFocus.bind($$);
-        mainPies = main.select('.' + CLASS.chartArcs).selectAll('.' + CLASS.chartArc).data($$.pie(targets)).attr("class", function (d) {
-            return classChartArc(d) + classFocus(d.data);
-        });
-        mainPieEnter = mainPies.enter().append("g").attr("class", classChartArc);
-        mainPieEnter.append('g').attr('class', classArcs);
-        mainPieEnter.append("text").attr("dy", $$.hasType('gauge') ? "-.1em" : ".35em").style("opacity", 0).style("text-anchor", "middle").style("pointer-events", "none");
-        // MEMO: can not keep same color..., but not bad to update color in redraw
-        //mainPieUpdate.exit().remove();
-    };
-
-    c3_chart_internal_fn.initArc = function () {
-        var $$ = this;
-        $$.arcs = $$.main.select('.' + CLASS.chart).append("g").attr("class", CLASS.chartArcs).attr("transform", $$.getTranslate('arc'));
-        $$.arcs.append('text').attr('class', CLASS.chartArcsTitle).style("text-anchor", "middle").text($$.getArcTitle());
-    };
-
-    c3_chart_internal_fn.redrawArc = function (duration, durationForExit, withTransform) {
-        var $$ = this,
-            d3 = $$.d3,
-            config = $$.config,
-            main = $$.main,
-            arcs,
-            mainArc,
-            backgroundArc,
-            arcLabelLines,
-            mainArcLabelLine,
-            hasGaugeType = $$.hasType('gauge');
-        arcs = main.selectAll('.' + CLASS.arcs).selectAll('.' + CLASS.arc).data($$.arcData.bind($$));
-        mainArc = arcs.enter().append('path').attr("class", $$.classArc.bind($$)).style("fill", function (d) {
-            return $$.color(d.data);
-        }).style("cursor", function (d) {
-            return config.interaction_enabled && config.data_selection_isselectable(d) ? "pointer" : null;
-        }).each(function (d) {
-            if ($$.isGaugeType(d.data)) {
-                d.startAngle = d.endAngle = config.gauge_startingAngle;
-            }
-            this._current = d;
-        }).merge(arcs);
-        if (hasGaugeType) {
-            arcLabelLines = main.selectAll('.' + CLASS.arcs).selectAll('.' + CLASS.arcLabelLine).data($$.arcData.bind($$));
-            mainArcLabelLine = arcLabelLines.enter().append('rect').attr("class", function (d) {
-                return CLASS.arcLabelLine + ' ' + CLASS.target + ' ' + CLASS.target + '-' + d.data.id;
-            }).merge(arcLabelLines);
-
-            if ($$.filterTargetsToShow($$.data.targets).length === 1) {
-                mainArcLabelLine.style("display", "none");
-            } else {
-                mainArcLabelLine.style("fill", function (d) {
-                    return config.color_pattern.length > 0 ? $$.levelColor(d.data.values[0].value) : $$.color(d.data);
-                }).style("display", config.gauge_labelLine_show ? "" : "none").each(function (d) {
-                    var lineLength = 0,
-                        lineThickness = 2,
-                        x = 0,
-                        y = 0,
-                        transform = "";
-                    if ($$.hiddenTargetIds.indexOf(d.data.id) < 0) {
-                        var updated = $$.updateAngle(d),
-                            innerLineLength = $$.gaugeArcWidth / $$.filterTargetsToShow($$.data.targets).length * (updated.index + 1),
-                            lineAngle = updated.endAngle - Math.PI / 2,
-                            arcInnerRadius = $$.radius - innerLineLength,
-                            linePositioningAngle = lineAngle - (arcInnerRadius === 0 ? 0 : 1 / arcInnerRadius);
-                        lineLength = $$.radiusExpanded - $$.radius + innerLineLength;
-                        x = Math.cos(linePositioningAngle) * arcInnerRadius;
-                        y = Math.sin(linePositioningAngle) * arcInnerRadius;
-                        transform = "rotate(" + lineAngle * 180 / Math.PI + ", " + x + ", " + y + ")";
-                    }
-                    d3.select(this).attr('x', x).attr('y', y).attr('width', lineLength).attr('height', lineThickness).attr('transform', transform).style("stroke-dasharray", "0, " + (lineLength + lineThickness) + ", 0");
-                });
-            }
-        }
-        mainArc.attr("transform", function (d) {
-            return !$$.isGaugeType(d.data) && withTransform ? "scale(0)" : "";
-        }).on('mouseover', config.interaction_enabled ? function (d) {
-            var updated, arcData;
-            if ($$.transiting) {
-                // skip while transiting
-                return;
-            }
-            updated = $$.updateAngle(d);
-            if (updated) {
-                arcData = $$.convertToArcData(updated);
-                // transitions
-                $$.expandArc(updated.data.id);
-                $$.api.focus(updated.data.id);
-                $$.toggleFocusLegend(updated.data.id, true);
-                $$.config.data_onmouseover(arcData, this);
-            }
-        } : null).on('mousemove', config.interaction_enabled ? function (d) {
-            var updated = $$.updateAngle(d),
-                arcData,
-                selectedData;
-            if (updated) {
-                arcData = $$.convertToArcData(updated), selectedData = [arcData];
-                $$.showTooltip(selectedData, this);
-            }
-        } : null).on('mouseout', config.interaction_enabled ? function (d) {
-            var updated, arcData;
-            if ($$.transiting) {
-                // skip while transiting
-                return;
-            }
-            updated = $$.updateAngle(d);
-            if (updated) {
-                arcData = $$.convertToArcData(updated);
-                // transitions
-                $$.unexpandArc(updated.data.id);
-                $$.api.revert();
-                $$.revertLegend();
-                $$.hideTooltip();
-                $$.config.data_onmouseout(arcData, this);
-            }
-        } : null).on('click', config.interaction_enabled ? function (d, i) {
-            var updated = $$.updateAngle(d),
-                arcData;
-            if (updated) {
-                arcData = $$.convertToArcData(updated);
-                if ($$.toggleShape) {
-                    $$.toggleShape(this, arcData, i);
-                }
-                $$.config.data_onclick.call($$.api, arcData, this);
-            }
-        } : null).each(function () {
-            $$.transiting = true;
-        }).transition().duration(duration).attrTween("d", function (d) {
-            var updated = $$.updateAngle(d),
-                interpolate;
-            if (!updated) {
-                return function () {
-                    return "M 0 0";
-                };
-            }
-            //                if (this._current === d) {
-            //                    this._current = {
-            //                        startAngle: Math.PI*2,
-            //                        endAngle: Math.PI*2,
-            //                    };
-            //                }
-            if (isNaN(this._current.startAngle)) {
-                this._current.startAngle = 0;
-            }
-            if (isNaN(this._current.endAngle)) {
-                this._current.endAngle = this._current.startAngle;
-            }
-            interpolate = d3.interpolate(this._current, updated);
-            this._current = interpolate(0);
-            return function (t) {
-                var interpolated = interpolate(t);
-                interpolated.data = d.data; // data.id will be updated by interporator
-                return $$.getArc(interpolated, true);
-            };
-        }).attr("transform", withTransform ? "scale(1)" : "").style("fill", function (d) {
-            return $$.levelColor ? $$.levelColor(d.data.values[0].value) : $$.color(d.data.id);
-        }) // Where gauge reading color would receive customization.
-        .call($$.endall, function () {
-            $$.transiting = false;
-        });
-        arcs.exit().transition().duration(durationForExit).style('opacity', 0).remove();
-        main.selectAll('.' + CLASS.chartArc).select('text').style("opacity", 0).attr('class', function (d) {
-            return $$.isGaugeType(d.data) ? CLASS.gaugeValue : '';
-        }).text($$.textForArcLabel.bind($$)).attr("transform", $$.transformForArcLabel.bind($$)).style('font-size', function (d) {
-            return $$.isGaugeType(d.data) && $$.filterTargetsToShow($$.data.targets).length === 1 ? Math.round($$.radius / 5) + 'px' : '';
-        }).transition().duration(duration).style("opacity", function (d) {
-            return $$.isTargetToShow(d.data.id) && $$.isArcType(d.data) ? 1 : 0;
-        });
-        main.select('.' + CLASS.chartArcsTitle).style("opacity", $$.hasType('donut') || hasGaugeType ? 1 : 0);
-
-        if (hasGaugeType) {
-            var index = 0;
-            backgroundArc = $$.arcs.select('g.' + CLASS.chartArcsBackground).selectAll('path.' + CLASS.chartArcsBackground).data($$.data.targets);
-            backgroundArc.enter().append("path");
-            backgroundArc.attr("class", function (d, i) {
-                return CLASS.chartArcsBackground + ' ' + CLASS.chartArcsBackground + '-' + i;
-            }).attr("d", function (d1) {
-                if ($$.hiddenTargetIds.indexOf(d1.id) >= 0) {
-                    return "M 0 0";
-                }
-
-                var d = {
-                    data: [{ value: config.gauge_max }],
-                    startAngle: config.gauge_startingAngle,
-                    endAngle: -1 * config.gauge_startingAngle * (config.gauge_fullCircle ? Math.PI : 1),
-                    index: index++
-                };
-                return $$.getArc(d, true, true);
-            });
-            backgroundArc.exit().remove();
-
-            $$.arcs.select('.' + CLASS.chartArcsGaugeUnit).attr("dy", ".75em").text(config.gauge_label_show ? config.gauge_units : '');
-            $$.arcs.select('.' + CLASS.chartArcsGaugeMin).attr("dx", -1 * ($$.innerRadius + ($$.radius - $$.innerRadius) / (config.gauge_fullCircle ? 1 : 2)) + "px").attr("dy", "1.2em").text(config.gauge_label_show ? $$.textForGaugeMinMax(config.gauge_min, false) : '');
-            $$.arcs.select('.' + CLASS.chartArcsGaugeMax).attr("dx", $$.innerRadius + ($$.radius - $$.innerRadius) / (config.gauge_fullCircle ? 1 : 2) + "px").attr("dy", "1.2em").text(config.gauge_label_show ? $$.textForGaugeMinMax(config.gauge_max, true) : '');
-        }
-    };
-    c3_chart_internal_fn.initGauge = function () {
-        var arcs = this.arcs;
-        if (this.hasType('gauge')) {
-            arcs.append('g').attr("class", CLASS.chartArcsBackground);
-            arcs.append("text").attr("class", CLASS.chartArcsGaugeUnit).style("text-anchor", "middle").style("pointer-events", "none");
-            arcs.append("text").attr("class", CLASS.chartArcsGaugeMin).style("text-anchor", "middle").style("pointer-events", "none");
-            arcs.append("text").attr("class", CLASS.chartArcsGaugeMax).style("text-anchor", "middle").style("pointer-events", "none");
-        }
-    };
-    c3_chart_internal_fn.getGaugeLabelHeight = function () {
-        return this.config.gauge_label_show ? 20 : 0;
-    };
-
-    c3_chart_internal_fn.hasCaches = function (ids) {
-        for (var i = 0; i < ids.length; i++) {
-            if (!(ids[i] in this.cache)) {
-                return false;
-            }
-        }
-        return true;
-    };
-    c3_chart_internal_fn.addCache = function (id, target) {
-        this.cache[id] = this.cloneTarget(target);
-    };
-    c3_chart_internal_fn.getCaches = function (ids) {
-        var targets = [],
-            i;
-        for (i = 0; i < ids.length; i++) {
-            if (ids[i] in this.cache) {
-                targets.push(this.cloneTarget(this.cache[ids[i]]));
-            }
-        }
-        return targets;
-    };
-
-    c3_chart_internal_fn.categoryName = function (i) {
-        var config = this.config;
-        return i < config.axis_x_categories.length ? config.axis_x_categories[i] : i;
-    };
-
-    c3_chart_internal_fn.generateTargetClass = function (targetId) {
-        return targetId || targetId === 0 ? ('-' + targetId).replace(/\s/g, '-') : '';
-    };
-    c3_chart_internal_fn.generateClass = function (prefix, targetId) {
-        return " " + prefix + " " + prefix + this.generateTargetClass(targetId);
-    };
-    c3_chart_internal_fn.classText = function (d) {
-        return this.generateClass(CLASS.text, d.index);
-    };
-    c3_chart_internal_fn.classTexts = function (d) {
-        return this.generateClass(CLASS.texts, d.id);
-    };
-    c3_chart_internal_fn.classShape = function (d) {
-        return this.generateClass(CLASS.shape, d.index);
-    };
-    c3_chart_internal_fn.classShapes = function (d) {
-        return this.generateClass(CLASS.shapes, d.id);
-    };
-    c3_chart_internal_fn.classLine = function (d) {
-        return this.classShape(d) + this.generateClass(CLASS.line, d.id);
-    };
-    c3_chart_internal_fn.classLines = function (d) {
-        return this.classShapes(d) + this.generateClass(CLASS.lines, d.id);
-    };
-    c3_chart_internal_fn.classCircle = function (d) {
-        return this.classShape(d) + this.generateClass(CLASS.circle, d.index);
-    };
-    c3_chart_internal_fn.classCircles = function (d) {
-        return this.classShapes(d) + this.generateClass(CLASS.circles, d.id);
-    };
-    c3_chart_internal_fn.classBar = function (d) {
-        return this.classShape(d) + this.generateClass(CLASS.bar, d.index);
-    };
-    c3_chart_internal_fn.classBars = function (d) {
-        return this.classShapes(d) + this.generateClass(CLASS.bars, d.id);
-    };
-    c3_chart_internal_fn.classArc = function (d) {
-        return this.classShape(d.data) + this.generateClass(CLASS.arc, d.data.id);
-    };
-    c3_chart_internal_fn.classArcs = function (d) {
-        return this.classShapes(d.data) + this.generateClass(CLASS.arcs, d.data.id);
-    };
-    c3_chart_internal_fn.classArea = function (d) {
-        return this.classShape(d) + this.generateClass(CLASS.area, d.id);
-    };
-    c3_chart_internal_fn.classAreas = function (d) {
-        return this.classShapes(d) + this.generateClass(CLASS.areas, d.id);
-    };
-    c3_chart_internal_fn.classRegion = function (d, i) {
-        return this.generateClass(CLASS.region, i) + ' ' + ('class' in d ? d['class'] : '');
-    };
-    c3_chart_internal_fn.classEvent = function (d) {
-        return this.generateClass(CLASS.eventRect, d.index);
-    };
-    c3_chart_internal_fn.classTarget = function (id) {
-        var $$ = this;
-        var additionalClassSuffix = $$.config.data_classes[id],
-            additionalClass = '';
-        if (additionalClassSuffix) {
-            additionalClass = ' ' + CLASS.target + '-' + additionalClassSuffix;
-        }
-        return $$.generateClass(CLASS.target, id) + additionalClass;
-    };
-    c3_chart_internal_fn.classFocus = function (d) {
-        return this.classFocused(d) + this.classDefocused(d);
-    };
-    c3_chart_internal_fn.classFocused = function (d) {
-        return ' ' + (this.focusedTargetIds.indexOf(d.id) >= 0 ? CLASS.focused : '');
-    };
-    c3_chart_internal_fn.classDefocused = function (d) {
-        return ' ' + (this.defocusedTargetIds.indexOf(d.id) >= 0 ? CLASS.defocused : '');
-    };
-    c3_chart_internal_fn.classChartText = function (d) {
-        return CLASS.chartText + this.classTarget(d.id);
-    };
-    c3_chart_internal_fn.classChartLine = function (d) {
-        return CLASS.chartLine + this.classTarget(d.id);
-    };
-    c3_chart_internal_fn.classChartBar = function (d) {
-        return CLASS.chartBar + this.classTarget(d.id);
-    };
-    c3_chart_internal_fn.classChartArc = function (d) {
-        return CLASS.chartArc + this.classTarget(d.data.id);
-    };
-    c3_chart_internal_fn.getTargetSelectorSuffix = function (targetId) {
-        return this.generateTargetClass(targetId).replace(/([?!@#$%^&*()_=+,.<>'":;\[\]\/|~`{}\\])/g, '\\$1');
-    };
-    c3_chart_internal_fn.selectorTarget = function (id, prefix) {
-        return (prefix || '') + '.' + CLASS.target + this.getTargetSelectorSuffix(id);
-    };
-    c3_chart_internal_fn.selectorTargets = function (ids, prefix) {
-        var $$ = this;
-        ids = ids || [];
-        return ids.length ? ids.map(function (id) {
-            return $$.selectorTarget(id, prefix);
-        }) : null;
-    };
-    c3_chart_internal_fn.selectorLegend = function (id) {
-        return '.' + CLASS.legendItem + this.getTargetSelectorSuffix(id);
-    };
-    c3_chart_internal_fn.selectorLegends = function (ids) {
-        var $$ = this;
-        return ids && ids.length ? ids.map(function (id) {
-            return $$.selectorLegend(id);
-        }) : null;
-    };
-
-    c3_chart_internal_fn.getClipPath = function (id) {
-        var isIE9 = window.navigator.appVersion.toLowerCase().indexOf("msie 9.") >= 0;
-        return "url(" + (isIE9 ? "" : document.URL.split('#')[0]) + "#" + id + ")";
-    };
-    c3_chart_internal_fn.appendClip = function (parent, id) {
-        return parent.append("clipPath").attr("id", id).append("rect");
-    };
-    c3_chart_internal_fn.getAxisClipX = function (forHorizontal) {
-        // axis line width + padding for left
-        var left = Math.max(30, this.margin.left);
-        return forHorizontal ? -(1 + left) : -(left - 1);
-    };
-    c3_chart_internal_fn.getAxisClipY = function (forHorizontal) {
-        return forHorizontal ? -20 : -this.margin.top;
-    };
-    c3_chart_internal_fn.getXAxisClipX = function () {
-        var $$ = this;
-        return $$.getAxisClipX(!$$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getXAxisClipY = function () {
-        var $$ = this;
-        return $$.getAxisClipY(!$$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getYAxisClipX = function () {
-        var $$ = this;
-        return $$.config.axis_y_inner ? -1 : $$.getAxisClipX($$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getYAxisClipY = function () {
-        var $$ = this;
-        return $$.getAxisClipY($$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getAxisClipWidth = function (forHorizontal) {
-        var $$ = this,
-            left = Math.max(30, $$.margin.left),
-            right = Math.max(30, $$.margin.right);
-        // width + axis line width + padding for left/right
-        return forHorizontal ? $$.width + 2 + left + right : $$.margin.left + 20;
-    };
-    c3_chart_internal_fn.getAxisClipHeight = function (forHorizontal) {
-        // less than 20 is not enough to show the axis label 'outer' without legend
-        return (forHorizontal ? this.margin.bottom : this.margin.top + this.height) + 20;
-    };
-    c3_chart_internal_fn.getXAxisClipWidth = function () {
-        var $$ = this;
-        return $$.getAxisClipWidth(!$$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getXAxisClipHeight = function () {
-        var $$ = this;
-        return $$.getAxisClipHeight(!$$.config.axis_rotated);
-    };
-    c3_chart_internal_fn.getYAxisClipWidth = function () {
-        var $$ = this;
-        return $$.getAxisClipWidth($$.config.axis_rotated) + ($$.config.axis_y_inner ? 20 : 0);
-    };
-    c3_chart_internal_fn.getYAxisClipHeight = function () {
-        var $$ = this;
-        return $$.getAxisClipHeight($$.config.axis_rotated);
-    };
-
-    c3_chart_internal_fn.generateColor = function () {
-        var $$ = this,
-            config = $$.config,
-            d3 = $$.d3,
-            colors = config.data_colors,
-            pattern = notEmpty(config.color_pattern) ? config.color_pattern : d3.schemeCategory10,
-            callback = config.data_color,
-            ids = [];
-
-        return function (d) {
-            var id = d.id || d.data && d.data.id || d,
-                color;
-
-            // if callback function is provided
-            if (colors[id] instanceof Function) {
-                color = colors[id](d);
-            }
-            // if specified, choose that color
-            else if (colors[id]) {
-                    color = colors[id];
-                }
-                // if not specified, choose from pattern
-                else {
-                        if (ids.indexOf(id) < 0) {
-                            ids.push(id);
-                        }
-                        color = pattern[ids.indexOf(id) % pattern.length];
-                        colors[id] = color;
-                    }
-            return callback instanceof Function ? callback(color, d) : color;
-        };
-    };
-    c3_chart_internal_fn.generateLevelColor = function () {
-        var $$ = this,
-            config = $$.config,
-            colors = config.color_pattern,
-            threshold = config.color_threshold,
-            asValue = threshold.unit === 'value',
-            values = threshold.values && threshold.values.length ? threshold.values : [],
-            max = threshold.max || 100;
-        return notEmpty(config.color_threshold) ? function (value) {
-            var i,
-                v,
-                color = colors[colors.length - 1];
-            for (i = 0; i < values.length; i++) {
-                v = asValue ? value : value * 100 / max;
-                if (v < values[i]) {
-                    color = colors[i];
-                    break;
-                }
-            }
-            return color;
-        } : null;
-    };
-
-    c3_chart_internal_fn.getDefaultConfig = function () {
-        var config = {
-            bindto: '#chart',
-            svg_classname: undefined,
-            size_width: undefined,
-            size_height: undefined,
-            padding_left: undefined,
-            padding_right: undefined,
-            padding_top: undefined,
-            padding_bottom: undefined,
-            resize_auto: true,
-            zoom_enabled: false,
-            zoom_initialRange: undefined,
-            zoom_privileged: false,
-            zoom_rescale: false,
-            zoom_onzoom: function zoom_onzoom() {},
-            zoom_onzoomstart: function zoom_onzoomstart() {},
-            zoom_onzoomend: function zoom_onzoomend() {},
-            zoom_x_min: undefined,
-            zoom_x_max: undefined,
-            interaction_brighten: true,
-            interaction_enabled: true,
-            onmouseover: function onmouseover() {},
-            onmouseout: function onmouseout() {},
-            onresize: function onresize() {},
-            onresized: function onresized() {},
-            oninit: function oninit() {},
-            onrendered: function onrendered() {},
-            transition_duration: 350,
-            data_x: undefined,
-            data_xs: {},
-            data_xFormat: '%Y-%m-%d',
-            data_xLocaltime: true,
-            data_xSort: true,
-            data_idConverter: function data_idConverter(id) {
-                return id;
-            },
-            data_names: {},
-            data_classes: {},
-            data_groups: [],
-            data_axes: {},
-            data_type: undefined,
-            data_types: {},
-            data_labels: {},
-            data_order: 'desc',
-            data_regions: {},
-            data_color: undefined,
-            data_colors: {},
-            data_hide: false,
-            data_filter: undefined,
-            data_selection_enabled: false,
-            data_selection_grouped: false,
-            data_selection_isselectable: function data_selection_isselectable() {
-                return true;
-            },
-            data_selection_multiple: true,
-            data_selection_draggable: false,
-            data_onclick: function data_onclick() {},
-            data_onmouseover: function data_onmouseover() {},
-            data_onmouseout: function data_onmouseout() {},
-            data_onselected: function data_onselected() {},
-            data_onunselected: function data_onunselected() {},
-            data_url: undefined,
-            data_headers: undefined,
-            data_json: undefined,
-            data_rows: undefined,
-            data_columns: undefined,
-            data_mimeType: undefined,
-            data_keys: undefined,
-            // configuration for no plot-able data supplied.
-            data_empty_label_text: "",
-            // subchart
-            subchart_show: false,
-            subchart_size_height: 60,
-            subchart_axis_x_show: true,
-            subchart_onbrush: function subchart_onbrush() {},
-            // color
-            color_pattern: [],
-            color_threshold: {},
-            // legend
-            legend_show: true,
-            legend_hide: false,
-            legend_position: 'bottom',
-            legend_inset_anchor: 'top-left',
-            legend_inset_x: 10,
-            legend_inset_y: 0,
-            legend_inset_step: undefined,
-            legend_item_onclick: undefined,
-            legend_item_onmouseover: undefined,
-            legend_item_onmouseout: undefined,
-            legend_equally: false,
-            legend_padding: 0,
-            legend_item_tile_width: 10,
-            legend_item_tile_height: 10,
-            // axis
-            axis_rotated: false,
-            axis_x_show: true,
-            axis_x_type: 'indexed',
-            axis_x_localtime: true,
-            axis_x_categories: [],
-            axis_x_tick_centered: false,
-            axis_x_tick_format: undefined,
-            axis_x_tick_culling: {},
-            axis_x_tick_culling_max: 10,
-            axis_x_tick_count: undefined,
-            axis_x_tick_fit: true,
-            axis_x_tick_values: null,
-            axis_x_tick_rotate: 0,
-            axis_x_tick_outer: true,
-            axis_x_tick_multiline: true,
-            axis_x_tick_multilineMax: 0,
-            axis_x_tick_width: null,
-            axis_x_max: undefined,
-            axis_x_min: undefined,
-            axis_x_padding: {},
-            axis_x_height: undefined,
-            axis_x_selection: undefined,
-            axis_x_label: {},
-            axis_x_inner: undefined,
-            axis_y_show: true,
-            axis_y_type: undefined,
-            axis_y_max: undefined,
-            axis_y_min: undefined,
-            axis_y_inverted: false,
-            axis_y_center: undefined,
-            axis_y_inner: undefined,
-            axis_y_label: {},
-            axis_y_tick_format: undefined,
-            axis_y_tick_outer: true,
-            axis_y_tick_values: null,
-            axis_y_tick_rotate: 0,
-            axis_y_tick_count: undefined,
-            axis_y_tick_time_type: undefined,
-            axis_y_tick_time_interval: undefined,
-            axis_y_padding: {},
-            axis_y_default: undefined,
-            axis_y2_show: false,
-            axis_y2_max: undefined,
-            axis_y2_min: undefined,
-            axis_y2_inverted: false,
-            axis_y2_center: undefined,
-            axis_y2_inner: undefined,
-            axis_y2_label: {},
-            axis_y2_tick_format: undefined,
-            axis_y2_tick_outer: true,
-            axis_y2_tick_values: null,
-            axis_y2_tick_count: undefined,
-            axis_y2_padding: {},
-            axis_y2_default: undefined,
-            // grid
-            grid_x_show: false,
-            grid_x_type: 'tick',
-            grid_x_lines: [],
-            grid_y_show: false,
-            // not used
-            // grid_y_type: 'tick',
-            grid_y_lines: [],
-            grid_y_ticks: 10,
-            grid_focus_show: true,
-            grid_lines_front: true,
-            // point - point of each data
-            point_show: true,
-            point_r: 2.5,
-            point_sensitivity: 10,
-            point_focus_expand_enabled: true,
-            point_focus_expand_r: undefined,
-            point_select_r: undefined,
-            // line
-            line_connectNull: false,
-            line_step_type: 'step',
-            // bar
-            bar_width: undefined,
-            bar_width_ratio: 0.6,
-            bar_width_max: undefined,
-            bar_zerobased: true,
-            bar_space: 0,
-            // area
-            area_zerobased: true,
-            area_above: false,
-            // pie
-            pie_label_show: true,
-            pie_label_format: undefined,
-            pie_label_threshold: 0.05,
-            pie_label_ratio: undefined,
-            pie_expand: {},
-            pie_expand_duration: 50,
-            // gauge
-            gauge_fullCircle: false,
-            gauge_label_show: true,
-            gauge_labelLine_show: true,
-            gauge_label_format: undefined,
-            gauge_min: 0,
-            gauge_max: 100,
-            gauge_startingAngle: -1 * Math.PI / 2,
-            gauge_label_extents: undefined,
-            gauge_units: undefined,
-            gauge_width: undefined,
-            gauge_arcs_minWidth: 5,
-            gauge_expand: {},
-            gauge_expand_duration: 50,
-            // donut
-            donut_label_show: true,
-            donut_label_format: undefined,
-            donut_label_threshold: 0.05,
-            donut_label_ratio: undefined,
-            donut_width: undefined,
-            donut_title: "",
-            donut_expand: {},
-            donut_expand_duration: 50,
-            // spline
-            spline_interpolation_type: 'cardinal',
-            // region - region to change style
-            regions: [],
-            // tooltip - show when mouseover on each data
-            tooltip_show: true,
-            tooltip_grouped: true,
-            tooltip_order: undefined,
-            tooltip_format_title: undefined,
-            tooltip_format_name: undefined,
-            tooltip_format_value: undefined,
-            tooltip_position: undefined,
-            tooltip_contents: function tooltip_contents(d, defaultTitleFormat, defaultValueFormat, color) {
-                return this.getTooltipContent ? this.getTooltipContent(d, defaultTitleFormat, defaultValueFormat, color) : '';
-            },
-            tooltip_init_show: false,
-            tooltip_init_x: 0,
-            tooltip_init_position: { top: '0px', left: '50px' },
-            tooltip_onshow: function tooltip_onshow() {},
-            tooltip_onhide: function tooltip_onhide() {},
-            // title
-            title_text: undefined,
-            title_padding: {
-                top: 0,
-                right: 0,
-                bottom: 0,
-                left: 0
-            },
-            title_position: 'top-center'
-        };
-
-        Object.keys(this.additionalConfig).forEach(function (key) {
-            config[key] = this.additionalConfig[key];
-        }, this);
-
-        return config;
-    };
-    c3_chart_internal_fn.additionalConfig = {};
-
-    c3_chart_internal_fn.loadConfig = function (config) {
-        var this_config = this.config,
-            target,
-            keys,
-            read;
-        function find() {
-            var key = keys.shift();
-            //        console.log("key =>", key, ", target =>", target);
-            if (key && target && (typeof target === 'undefined' ? 'undefined' : _typeof(target)) === 'object' && key in target) {
-                target = target[key];
-                return find();
-            } else if (!key) {
-                return target;
-            } else {
-                return undefined;
-            }
-        }
-        Object.keys(this_config).forEach(function (key) {
-            target = config;
-            keys = key.split('_');
-            read = find();
-            //        console.log("CONFIG : ", key, read);
-            if (isDefined(read)) {
-                this_config[key] = read;
-            }
-        });
-    };
-
-    c3_chart_internal_fn.convertUrlToData = function (url, mimeType, headers, keys, done) {
-        var $$ = this,
-            type = mimeType ? mimeType : 'csv',
-            f,
-            converter;
-
-        if (type === 'json') {
-            f = $$.d3.json;
-            converter = $$.convertJsonToData;
-        } else if (type === 'tsv') {
-            f = $$.d3.tsv;
-            converter = $$.convertXsvToData;
-        } else {
-            f = $$.d3.csv;
-            converter = $$.convertXsvToData;
-        }
-
-        f(url, headers).then(function (data) {
-            done.call($$, converter.call($$, data, keys));
-        }).catch(function (error) {
-            throw error;
-        });
-    };
-    c3_chart_internal_fn.convertXsvToData = function (xsv) {
-        var keys = xsv.columns,
-            rows = xsv;
-        if (rows.length === 0) {
-            return { keys: keys, rows: [keys.reduce(function (row, key) {
-                    return Object.assign(row, defineProperty({}, key, null));
-                }, {})] };
-        } else {
-            // [].concat() is to convert result into a plain array otherwise
-            // test is not happy because rows have properties.
-            return { keys: keys, rows: [].concat(xsv) };
-        }
-    };
-    c3_chart_internal_fn.convertJsonToData = function (json, keys) {
-        var $$ = this,
-            new_rows = [],
-            targetKeys,
-            data;
-        if (keys) {
-            // when keys specified, json would be an array that includes objects
-            if (keys.x) {
-                targetKeys = keys.value.concat(keys.x);
-                $$.config.data_x = keys.x;
-            } else {
-                targetKeys = keys.value;
-            }
-            new_rows.push(targetKeys);
-            json.forEach(function (o) {
-                var new_row = [];
-                targetKeys.forEach(function (key) {
-                    // convert undefined to null because undefined data will be removed in convertDataToTargets()
-                    var v = $$.findValueInJson(o, key);
-                    if (isUndefined(v)) {
-                        v = null;
-                    }
-                    new_row.push(v);
-                });
-                new_rows.push(new_row);
-            });
-            data = $$.convertRowsToData(new_rows);
-        } else {
-            Object.keys(json).forEach(function (key) {
-                new_rows.push([key].concat(json[key]));
-            });
-            data = $$.convertColumnsToData(new_rows);
-        }
-        return data;
-    };
-    c3_chart_internal_fn.findValueInJson = function (object, path) {
-        path = path.replace(/\[(\w+)\]/g, '.$1'); // convert indexes to properties (replace [] with .)
-        path = path.replace(/^\./, ''); // strip a leading dot
-        var pathArray = path.split('.');
-        for (var i = 0; i < pathArray.length; ++i) {
-            var k = pathArray[i];
-            if (k in object) {
-                object = object[k];
-            } else {
-                return;
-            }
-        }
-        return object;
-    };
-
-    /**
-     * Converts the rows to normalized data.
-     * @param {any[][]} rows The row data
-     * @return {Object}
-     */
-    c3_chart_internal_fn.convertRowsToData = function (rows) {
-        var newRows = [];
-        var keys = rows[0];
-
-        for (var i = 1; i < rows.length; i++) {
-            var newRow = {};
-            for (var j = 0; j < rows[i].length; j++) {
-                if (isUndefined(rows[i][j])) {
-                    throw new Error("Source data is missing a component at (" + i + "," + j + ")!");
-                }
-                newRow[keys[j]] = rows[i][j];
-            }
-            newRows.push(newRow);
-        }
-        return { keys: keys, rows: newRows };
-    };
-
-    /**
-     * Converts the columns to normalized data.
-     * @param {any[][]} columns The column data
-     * @return {Object}
-     */
-    c3_chart_internal_fn.convertColumnsToData = function (columns) {
-        var newRows = [];
-        var keys = [];
-
-        for (var i = 0; i < columns.length; i++) {
-            var key = columns[i][0];
-            for (var j = 1; j < columns[i].length; j++) {
-                if (isUndefined(newRows[j - 1])) {
-                    newRows[j - 1] = {};
-                }
-                if (isUndefined(columns[i][j])) {
-                    throw new Error("Source data is missing a component at (" + i + "," + j + ")!");
-                }
-                newRows[j - 1][key] = columns[i][j];
-            }
-            keys.push(key);
-        }
-
-        return { keys: keys, rows: newRows };
-    };
-
-    /**
-     * Converts the data format into the target format.
-     * @param {!Object} data
-     * @param {!Array} data.keys Ordered list of target IDs.
-     * @param {!Array} data.rows Rows of data to convert.
-     * @param {boolean} appendXs True to append to $$.data.xs, False to replace.
-     * @return {!Array}
-     */
-    c3_chart_internal_fn.convertDataToTargets = function (data, appendXs) {
-        var $$ = this,
-            config = $$.config,
-            targets,
-            ids,
-            xs,
-            keys;
-
-        // handles format where keys are not orderly provided
-        if (isArray(data)) {
-            keys = Object.keys(data[0]);
-        } else {
-            keys = data.keys;
-            data = data.rows;
-        }
-
-        ids = keys.filter($$.isNotX, $$);
-        xs = keys.filter($$.isX, $$);
-
-        // save x for update data by load when custom x and c3.x API
-        ids.forEach(function (id) {
-            var xKey = $$.getXKey(id);
-
-            if ($$.isCustomX() || $$.isTimeSeries()) {
-                // if included in input data
-                if (xs.indexOf(xKey) >= 0) {
-                    $$.data.xs[id] = (appendXs && $$.data.xs[id] ? $$.data.xs[id] : []).concat(data.map(function (d) {
-                        return d[xKey];
-                    }).filter(isValue).map(function (rawX, i) {
-                        return $$.generateTargetX(rawX, id, i);
-                    }));
-                }
-                // if not included in input data, find from preloaded data of other id's x
-                else if (config.data_x) {
-                        $$.data.xs[id] = $$.getOtherTargetXs();
-                    }
-                    // if not included in input data, find from preloaded data
-                    else if (notEmpty(config.data_xs)) {
-                            $$.data.xs[id] = $$.getXValuesOfXKey(xKey, $$.data.targets);
-                        }
-                // MEMO: if no x included, use same x of current will be used
-            } else {
-                $$.data.xs[id] = data.map(function (d, i) {
-                    return i;
-                });
-            }
-        });
-
-        // check x is defined
-        ids.forEach(function (id) {
-            if (!$$.data.xs[id]) {
-                throw new Error('x is not defined for id = "' + id + '".');
-            }
-        });
-
-        // convert to target
-        targets = ids.map(function (id, index) {
-            var convertedId = config.data_idConverter(id);
-            return {
-                id: convertedId,
-                id_org: id,
-                values: data.map(function (d, i) {
-                    var xKey = $$.getXKey(id),
-                        rawX = d[xKey],
-                        value = d[id] !== null && !isNaN(d[id]) ? +d[id] : null,
-                        x;
-                    // use x as categories if custom x and categorized
-                    if ($$.isCustomX() && $$.isCategorized() && !isUndefined(rawX)) {
-                        if (index === 0 && i === 0) {
-                            config.axis_x_categories = [];
-                        }
-                        x = config.axis_x_categories.indexOf(rawX);
-                        if (x === -1) {
-                            x = config.axis_x_categories.length;
-                            config.axis_x_categories.push(rawX);
-                        }
-                    } else {
-                        x = $$.generateTargetX(rawX, id, i);
-                    }
-                    // mark as x = undefined if value is undefined and filter to remove after mapped
-                    if (isUndefined(d[id]) || $$.data.xs[id].length <= i) {
-                        x = undefined;
-                    }
-                    return { x: x, value: value, id: convertedId };
-                }).filter(function (v) {
-                    return isDefined(v.x);
-                })
-            };
-        });
-
-        // finish targets
-        targets.forEach(function (t) {
-            var i;
-            // sort values by its x
-            if (config.data_xSort) {
-                t.values = t.values.sort(function (v1, v2) {
-                    var x1 = v1.x || v1.x === 0 ? v1.x : Infinity,
-                        x2 = v2.x || v2.x === 0 ? v2.x : Infinity;
-                    return x1 - x2;
-                });
-            }
-            // indexing each value
-            i = 0;
-            t.values.forEach(function (v) {
-                v.index = i++;
-            });
-            // this needs to be sorted because its index and value.index is identical
-            $$.data.xs[t.id].sort(function (v1, v2) {
-                return v1 - v2;
-            });
-        });
-
-        // cache information about values
-        $$.hasNegativeValue = $$.hasNegativeValueInTargets(targets);
-        $$.hasPositiveValue = $$.hasPositiveValueInTargets(targets);
-
-        // set target types
-        if (config.data_type) {
-            $$.setTargetType($$.mapToIds(targets).filter(function (id) {
-                return !(id in config.data_types);
-            }), config.data_type);
-        }
-
-        // cache as original id keyed
-        targets.forEach(function (d) {
-            $$.addCache(d.id_org, d);
-        });
-
-        return targets;
-    };
-
-    c3_chart_internal_fn.isX = function (key) {
-        var $$ = this,
-            config = $$.config;
-        return config.data_x && key === config.data_x || notEmpty(config.data_xs) && hasValue(config.data_xs, key);
-    };
-    c3_chart_internal_fn.isNotX = function (key) {
-        return !this.isX(key);
-    };
-    c3_chart_internal_fn.getXKey = function (id) {
-        var $$ = this,
-            config = $$.config;
-        return config.data_x ? config.data_x : notEmpty(config.data_xs) ? config.data_xs[id] : null;
-    };
-    c3_chart_internal_fn.getXValuesOfXKey = function (key, targets) {
-        var $$ = this,
-            xValues,
-            ids = targets && notEmpty(targets) ? $$.mapToIds(targets) : [];
-        ids.forEach(function (id) {
-            if ($$.getXKey(id) === key) {
-                xValues = $$.data.xs[id];
-            }
-        });
-        return xValues;
-    };
-    c3_chart_internal_fn.getXValue = function (id, i) {
-        var $$ = this;
-        return id in $$.data.xs && $$.data.xs[id] && isValue($$.data.xs[id][i]) ? $$.data.xs[id][i] : i;
-    };
-    c3_chart_internal_fn.getOtherTargetXs = function () {
-        var $$ = this,
-            idsForX = Object.keys($$.data.xs);
-        return idsForX.length ? $$.data.xs[idsForX[0]] : null;
-    };
-    c3_chart_internal_fn.getOtherTargetX = function (index) {
-        var xs = this.getOtherTargetXs();
-        return xs && index < xs.length ? xs[index] : null;
-    };
-    c3_chart_internal_fn.addXs = function (xs) {
-        var $$ = this;
-        Object.keys(xs).forEach(function (id) {
-            $$.config.data_xs[id] = xs[id];
-        });
-    };
-    c3_chart_internal_fn.addName = function (data) {
-        var $$ = this,
-            name;
-        if (data) {
-            name = $$.config.data_names[data.id];
-            data.name = name !== undefined ? name : data.id;
-        }
-        return data;
-    };
-    c3_chart_internal_fn.getValueOnIndex = function (values, index) {
-        var valueOnIndex = values.filter(function (v) {
-            return v.index === index;
-        });
-        return valueOnIndex.length ? valueOnIndex[0] : null;
-    };
-    c3_chart_internal_fn.updateTargetX = function (targets, x) {
-        var $$ = this;
-        targets.forEach(function (t) {
-            t.values.forEach(function (v, i) {
-                v.x = $$.generateTargetX(x[i], t.id, i);
-            });
-            $$.data.xs[t.id] = x;
-        });
-    };
-    c3_chart_internal_fn.updateTargetXs = function (targets, xs) {
-        var $$ = this;
-        targets.forEach(function (t) {
-            if (xs[t.id]) {
-                $$.updateTargetX([t], xs[t.id]);
-            }
-        });
-    };
-    c3_chart_internal_fn.generateTargetX = function (rawX, id, index) {
-        var $$ = this,
-            x;
-        if ($$.isTimeSeries()) {
-            x = rawX ? $$.parseDate(rawX) : $$.parseDate($$.getXValue(id, index));
-        } else if ($$.isCustomX() && !$$.isCategorized()) {
-            x = isValue(rawX) ? +rawX : $$.getXValue(id, index);
-        } else {
-            x = index;
-        }
-        return x;
-    };
-    c3_chart_internal_fn.cloneTarget = function (target) {
-        return {
-            id: target.id,
-            id_org: target.id_org,
-            values: target.values.map(function (d) {
-                return { x: d.x, value: d.value, id: d.id };
-            })
-        };
-    };
-    c3_chart_internal_fn.getMaxDataCount = function () {
-        var $$ = this;
-        return $$.d3.max($$.data.targets, function (t) {
-            return t.values.length;
-        });
-    };
-    c3_chart_internal_fn.mapToIds = function (targets) {
-        return targets.map(function (d) {
-            return d.id;
-        });
-    };
-    c3_chart_internal_fn.mapToTargetIds = function (ids) {
-        var $$ = this;
-        return ids ? [].concat(ids) : $$.mapToIds($$.data.targets);
-    };
-    c3_chart_internal_fn.hasTarget = function (targets, id) {
-        var ids = this.mapToIds(targets),
-            i;
-        for (i = 0; i < ids.length; i++) {
-            if (ids[i] === id) {
-                return true;
-            }
-        }
-        return false;
-    };
-    c3_chart_internal_fn.isTargetToShow = function (targetId) {
-        return this.hiddenTargetIds.indexOf(targetId) < 0;
-    };
-    c3_chart_internal_fn.isLegendToShow = function (targetId) {
-        return this.hiddenLegendIds.indexOf(targetId) < 0;
-    };
-    c3_chart_internal_fn.filterTargetsToShow = function (targets) {
-        var $$ = this;
-        return targets.filter(function (t) {
-            return $$.isTargetToShow(t.id);
-        });
-    };
-    c3_chart_internal_fn.mapTargetsToUniqueXs = function (targets) {
-        var $$ = this;
-        var xs = $$.d3.set($$.d3.merge(targets.map(function (t) {
-            return t.values.map(function (v) {
-                return +v.x;
-            });
-        }))).values();
-        xs = $$.isTimeSeries() ? xs.map(function (x) {
-            return new Date(+x);
-        }) : xs.map(function (x) {
-            return +x;
-        });
-        return xs.sort(function (a, b) {
-            return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-        });
-    };
-    c3_chart_internal_fn.addHiddenTargetIds = function (targetIds) {
-        targetIds = targetIds instanceof Array ? targetIds : new Array(targetIds);
-        for (var i = 0; i < targetIds.length; i++) {
-            if (this.hiddenTargetIds.indexOf(targetIds[i]) < 0) {
-                this.hiddenTargetIds = this.hiddenTargetIds.concat(targetIds[i]);
-            }
-        }
-    };
-    c3_chart_internal_fn.removeHiddenTargetIds = function (targetIds) {
-        this.hiddenTargetIds = this.hiddenTargetIds.filter(function (id) {
-            return targetIds.indexOf(id) < 0;
-        });
-    };
-    c3_chart_internal_fn.addHiddenLegendIds = function (targetIds) {
-        targetIds = targetIds instanceof Array ? targetIds : new Array(targetIds);
-        for (var i = 0; i < targetIds.length; i++) {
-            if (this.hiddenLegendIds.indexOf(targetIds[i]) < 0) {
-                this.hiddenLegendIds = this.hiddenLegendIds.concat(targetIds[i]);
-            }
-        }
-    };
-    c3_chart_internal_fn.removeHiddenLegendIds = function (targetIds) {
-        this.hiddenLegendIds = this.hiddenLegendIds.filter(function (id) {
-            return targetIds.indexOf(id) < 0;
-        });
-    };
-    c3_chart_internal_fn.getValuesAsIdKeyed = function (targets) {
-        var ys = {};
-        targets.forEach(function (t) {
-            ys[t.id] = [];
-            t.values.forEach(function (v) {
-                ys[t.id].push(v.value);
-            });
-        });
-        return ys;
-    };
-    c3_chart_internal_fn.checkValueInTargets = function (targets, checker) {
-        var ids = Object.keys(targets),
-            i,
-            j,
-            values;
-        for (i = 0; i < ids.length; i++) {
-            values = targets[ids[i]].values;
-            for (j = 0; j < values.length; j++) {
-                if (checker(values[j].value)) {
-                    return true;
-                }
-            }
-        }
-        return false;
-    };
-    c3_chart_internal_fn.hasNegativeValueInTargets = function (targets) {
-        return this.checkValueInTargets(targets, function (v) {
-            return v < 0;
-        });
-    };
-    c3_chart_internal_fn.hasPositiveValueInTargets = function (targets) {
-        return this.checkValueInTargets(targets, function (v) {
-            return v > 0;
-        });
-    };
-    c3_chart_internal_fn.isOrderDesc = function () {
-        var config = this.config;
-        return typeof config.data_order === 'string' && config.data_order.toLowerCase() === 'desc';
-    };
-    c3_chart_internal_fn.isOrderAsc = function () {
-        var config = this.config;
-        return typeof config.data_order === 'string' && config.data_order.toLowerCase() === 'asc';
-    };
-    c3_chart_internal_fn.getOrderFunction = function () {
-        var $$ = this,
-            config = $$.config,
-            orderAsc = $$.isOrderAsc(),
-            orderDesc = $$.isOrderDesc();
-        if (orderAsc || orderDesc) {
-            var reducer = function reducer(p, c) {
-                return p + Math.abs(c.value);
-            };
-            return function (t1, t2) {
-                var t1Sum = t1.values.reduce(reducer, 0),
-                    t2Sum = t2.values.reduce(reducer, 0);
-                return orderAsc ? t2Sum - t1Sum : t1Sum - t2Sum;
-            };
-        } else if (isFunction(config.data_order)) {
-            return config.data_order;
-        } else if (isArray(config.data_order)) {
-            var order = config.data_order;
-            return function (t1, t2) {
-                return order.indexOf(t1.id) - order.indexOf(t2.id);
-            };
-        }
-    };
-    c3_chart_internal_fn.orderTargets = function (targets) {
-        var fct = this.getOrderFunction();
-        if (fct) {
-            targets.sort(fct);
-        }
-        return targets;
-    };
-    c3_chart_internal_fn.filterByX = function (targets, x) {
-        return this.d3.merge(targets.map(function (t) {
-            return t.values;
-        })).filter(function (v) {
-            return v.x - x === 0;
-        });
-    };
-    c3_chart_internal_fn.filterRemoveNull = function (data) {
-        return data.filter(function (d) {
-            return isValue(d.value);
-        });
-    };
-    c3_chart_internal_fn.filterByXDomain = function (targets, xDomain) {
-        return targets.map(function (t) {
-            return {
-                id: t.id,
-                id_org: t.id_org,
-                values: t.values.filter(function (v) {
-                    return xDomain[0] <= v.x && v.x <= xDomain[1];
-                })
-            };
-        });
-    };
-    c3_chart_internal_fn.hasDataLabel = function () {
-        var config = this.config;
-        if (typeof config.data_labels === 'boolean' && config.data_labels) {
-            return true;
-        } else if (_typeof(config.data_labels) === 'object' && notEmpty(config.data_labels)) {
-            return true;
-        }
-        return false;
-    };
-    c3_chart_internal_fn.getDataLabelLength = function (min, max, key) {
-        var $$ = this,
-            lengths = [0, 0],
-            paddingCoef = 1.3;
-        $$.selectChart.select('svg').selectAll('.dummy').data([min, max]).enter().append('text').text(function (d) {
-            return $$.dataLabelFormat(d.id)(d);
-        }).each(function (d, i) {
-            lengths[i] = this.getBoundingClientRect()[key] * paddingCoef;
-        }).remove();
-        return lengths;
-    };
-    c3_chart_internal_fn.isNoneArc = function (d) {
-        return this.hasTarget(this.data.targets, d.id);
-    }, c3_chart_internal_fn.isArc = function (d) {
-        return 'data' in d && this.hasTarget(this.data.targets, d.data.id);
-    };
-    c3_chart_internal_fn.findClosestFromTargets = function (targets, pos) {
-        var $$ = this,
-            candidates;
-
-        // map to array of closest points of each target
-        candidates = targets.map(function (target) {
-            return $$.findClosest(target.values, pos);
-        });
-
-        // decide closest point and return
-        return $$.findClosest(candidates, pos);
-    };
-    c3_chart_internal_fn.findClosest = function (values, pos) {
-        var $$ = this,
-            minDist = $$.config.point_sensitivity,
-            closest;
-
-        // find mouseovering bar
-        values.filter(function (v) {
-            return v && $$.isBarType(v.id);
-        }).forEach(function (v) {
-            var shape = $$.main.select('.' + CLASS.bars + $$.getTargetSelectorSuffix(v.id) + ' .' + CLASS.bar + '-' + v.index).node();
-            if (!closest && $$.isWithinBar($$.d3.mouse(shape), shape)) {
-                closest = v;
-            }
-        });
-
-        // find closest point from non-bar
-        values.filter(function (v) {
-            return v && !$$.isBarType(v.id);
-        }).forEach(function (v) {
-            var d = $$.dist(v, pos);
-            if (d < minDist) {
-                minDist = d;
-                closest = v;
-            }
-        });
-
-        return closest;
-    };
-    c3_chart_internal_fn.dist = function (data, pos) {
-        var $$ = this,
-            config = $$.config,
-            xIndex = config.axis_rotated ? 1 : 0,
-            yIndex = config.axis_rotated ? 0 : 1,
-            y = $$.circleY(data, data.index),
-            x = $$.x(data.x);
-        return Math.sqrt(Math.pow(x - pos[xIndex], 2) + Math.pow(y - pos[yIndex], 2));
-    };
-    c3_chart_internal_fn.convertValuesToStep = function (values) {
-        var converted = [].concat(values),
-            i;
-
-        if (!this.isCategorized()) {
-            return values;
-        }
-
-        for (i = values.length + 1; 0 < i; i--) {
-            converted[i] = converted[i - 1];
-        }
-
-        converted[0] = {
-            x: converted[0].x - 1,
-            value: converted[0].value,
-            id: converted[0].id
-        };
-        converted[values.length + 1] = {
-            x: converted[values.length].x + 1,
-            value: converted[values.length].value,
-            id: converted[values.length].id
-        };
-
-        return converted;
-    };
-    c3_chart_internal_fn.updateDataAttributes = function (name, attrs) {
-        var $$ = this,
-            config = $$.config,
-            current = config['data_' + name];
-        if (typeof attrs === 'undefined') {
-            return current;
-        }
-        Object.keys(attrs).forEach(function (id) {
-            current[id] = attrs[id];
-        });
-        $$.redraw({ withLegend: true });
-        return current;
-    };
-
-    c3_chart_internal_fn.load = function (targets, args) {
-        var $$ = this;
-        if (targets) {
-            // filter loading targets if needed
-            if (args.filter) {
-                targets = targets.filter(args.filter);
-            }
-            // set type if args.types || args.type specified
-            if (args.type || args.types) {
-                targets.forEach(function (t) {
-                    var type = args.types && args.types[t.id] ? args.types[t.id] : args.type;
-                    $$.setTargetType(t.id, type);
-                });
-            }
-            // Update/Add data
-            $$.data.targets.forEach(function (d) {
-                for (var i = 0; i < targets.length; i++) {
-                    if (d.id === targets[i].id) {
-                        d.values = targets[i].values;
-                        targets.splice(i, 1);
-                        break;
-                    }
-                }
-            });
-            $$.data.targets = $$.data.targets.concat(targets); // add remained
-        }
-
-        // Set targets
-        $$.updateTargets($$.data.targets);
-
-        // Redraw with new targets
-        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
-
-        if (args.done) {
-            args.done();
-        }
-    };
-    c3_chart_internal_fn.loadFromArgs = function (args) {
-        var $$ = this;
-        if (args.data) {
-            $$.load($$.convertDataToTargets(args.data), args);
-        } else if (args.url) {
-            $$.convertUrlToData(args.url, args.mimeType, args.headers, args.keys, function (data) {
-                $$.load($$.convertDataToTargets(data), args);
-            });
-        } else if (args.json) {
-            $$.load($$.convertDataToTargets($$.convertJsonToData(args.json, args.keys)), args);
-        } else if (args.rows) {
-            $$.load($$.convertDataToTargets($$.convertRowsToData(args.rows)), args);
-        } else if (args.columns) {
-            $$.load($$.convertDataToTargets($$.convertColumnsToData(args.columns)), args);
-        } else {
-            $$.load(null, args);
-        }
-    };
-    c3_chart_internal_fn.unload = function (targetIds, done) {
-        var $$ = this;
-        if (!done) {
-            done = function done() {};
-        }
-        // filter existing target
-        targetIds = targetIds.filter(function (id) {
-            return $$.hasTarget($$.data.targets, id);
-        });
-        // If no target, call done and return
-        if (!targetIds || targetIds.length === 0) {
-            done();
-            return;
-        }
-        $$.svg.selectAll(targetIds.map(function (id) {
-            return $$.selectorTarget(id);
-        })).transition().style('opacity', 0).remove().call($$.endall, done);
-        targetIds.forEach(function (id) {
-            // Reset fadein for future load
-            $$.withoutFadeIn[id] = false;
-            // Remove target's elements
-            if ($$.legend) {
-                $$.legend.selectAll('.' + CLASS.legendItem + $$.getTargetSelectorSuffix(id)).remove();
-            }
-            // Remove target
-            $$.data.targets = $$.data.targets.filter(function (t) {
-                return t.id !== id;
-            });
-        });
-    };
-
-    c3_chart_internal_fn.getYDomainMin = function (targets) {
-        var $$ = this,
-            config = $$.config,
-            ids = $$.mapToIds(targets),
-            ys = $$.getValuesAsIdKeyed(targets),
-            j,
-            k,
-            baseId,
-            idsInGroup,
-            id,
-            hasNegativeValue;
-        if (config.data_groups.length > 0) {
-            hasNegativeValue = $$.hasNegativeValueInTargets(targets);
-            for (j = 0; j < config.data_groups.length; j++) {
-                // Determine baseId
-                idsInGroup = config.data_groups[j].filter(function (id) {
-                    return ids.indexOf(id) >= 0;
-                });
-                if (idsInGroup.length === 0) {
-                    continue;
-                }
-                baseId = idsInGroup[0];
-                // Consider negative values
-                if (hasNegativeValue && ys[baseId]) {
-                    ys[baseId].forEach(function (v, i) {
-                        ys[baseId][i] = v < 0 ? v : 0;
-                    });
-                }
-                // Compute min
-                for (k = 1; k < idsInGroup.length; k++) {
-                    id = idsInGroup[k];
-                    if (!ys[id]) {
-                        continue;
-                    }
-                    ys[id].forEach(function (v, i) {
-                        if ($$.axis.getId(id) === $$.axis.getId(baseId) && ys[baseId] && !(hasNegativeValue && +v > 0)) {
-                            ys[baseId][i] += +v;
-                        }
-                    });
-                }
-            }
-        }
-        return $$.d3.min(Object.keys(ys).map(function (key) {
-            return $$.d3.min(ys[key]);
-        }));
-    };
-    c3_chart_internal_fn.getYDomainMax = function (targets) {
-        var $$ = this,
-            config = $$.config,
-            ids = $$.mapToIds(targets),
-            ys = $$.getValuesAsIdKeyed(targets),
-            j,
-            k,
-            baseId,
-            idsInGroup,
-            id,
-            hasPositiveValue;
-        if (config.data_groups.length > 0) {
-            hasPositiveValue = $$.hasPositiveValueInTargets(targets);
-            for (j = 0; j < config.data_groups.length; j++) {
-                // Determine baseId
-                idsInGroup = config.data_groups[j].filter(function (id) {
-                    return ids.indexOf(id) >= 0;
-                });
-                if (idsInGroup.length === 0) {
-                    continue;
-                }
-                baseId = idsInGroup[0];
-                // Consider positive values
-                if (hasPositiveValue && ys[baseId]) {
-                    ys[baseId].forEach(function (v, i) {
-                        ys[baseId][i] = v > 0 ? v : 0;
-                    });
-                }
-                // Compute max
-                for (k = 1; k < idsInGroup.length; k++) {
-                    id = idsInGroup[k];
-                    if (!ys[id]) {
-                        continue;
-                    }
-                    ys[id].forEach(function (v, i) {
-                        if ($$.axis.getId(id) === $$.axis.getId(baseId) && ys[baseId] && !(hasPositiveValue && +v < 0)) {
-                            ys[baseId][i] += +v;
-                        }
-                    });
-                }
-            }
-        }
-        return $$.d3.max(Object.keys(ys).map(function (key) {
-            return $$.d3.max(ys[key]);
-        }));
-    };
-    c3_chart_internal_fn.getYDomain = function (targets, axisId, xDomain) {
-        var $$ = this,
-            config = $$.config,
-            targetsByAxisId = targets.filter(function (t) {
-            return $$.axis.getId(t.id) === axisId;
-        }),
-            yTargets = xDomain ? $$.filterByXDomain(targetsByAxisId, xDomain) : targetsByAxisId,
-            yMin = axisId === 'y2' ? config.axis_y2_min : config.axis_y_min,
-            yMax = axisId === 'y2' ? config.axis_y2_max : config.axis_y_max,
-            yDomainMin = $$.getYDomainMin(yTargets),
-            yDomainMax = $$.getYDomainMax(yTargets),
-            domain,
-            domainLength,
-            padding,
-            padding_top,
-            padding_bottom,
-            center = axisId === 'y2' ? config.axis_y2_center : config.axis_y_center,
-            yDomainAbs,
-            lengths,
-            diff,
-            ratio,
-            isAllPositive,
-            isAllNegative,
-            isZeroBased = $$.hasType('bar', yTargets) && config.bar_zerobased || $$.hasType('area', yTargets) && config.area_zerobased,
-            isInverted = axisId === 'y2' ? config.axis_y2_inverted : config.axis_y_inverted,
-            showHorizontalDataLabel = $$.hasDataLabel() && config.axis_rotated,
-            showVerticalDataLabel = $$.hasDataLabel() && !config.axis_rotated;
-
-        // MEMO: avoid inverting domain unexpectedly
-        yDomainMin = isValue(yMin) ? yMin : isValue(yMax) ? yDomainMin < yMax ? yDomainMin : yMax - 10 : yDomainMin;
-        yDomainMax = isValue(yMax) ? yMax : isValue(yMin) ? yMin < yDomainMax ? yDomainMax : yMin + 10 : yDomainMax;
-
-        if (yTargets.length === 0) {
-            // use current domain if target of axisId is none
-            return axisId === 'y2' ? $$.y2.domain() : $$.y.domain();
-        }
-        if (isNaN(yDomainMin)) {
-            // set minimum to zero when not number
-            yDomainMin = 0;
-        }
-        if (isNaN(yDomainMax)) {
-            // set maximum to have same value as yDomainMin
-            yDomainMax = yDomainMin;
-        }
-        if (yDomainMin === yDomainMax) {
-            yDomainMin < 0 ? yDomainMax = 0 : yDomainMin = 0;
-        }
-        isAllPositive = yDomainMin >= 0 && yDomainMax >= 0;
-        isAllNegative = yDomainMin <= 0 && yDomainMax <= 0;
-
-        // Cancel zerobased if axis_*_min / axis_*_max specified
-        if (isValue(yMin) && isAllPositive || isValue(yMax) && isAllNegative) {
-            isZeroBased = false;
-        }
-
-        // Bar/Area chart should be 0-based if all positive|negative
-        if (isZeroBased) {
-            if (isAllPositive) {
-                yDomainMin = 0;
-            }
-            if (isAllNegative) {
-                yDomainMax = 0;
-            }
-        }
-
-        domainLength = Math.abs(yDomainMax - yDomainMin);
-        padding = padding_top = padding_bottom = domainLength * 0.1;
-
-        if (typeof center !== 'undefined') {
-            yDomainAbs = Math.max(Math.abs(yDomainMin), Math.abs(yDomainMax));
-            yDomainMax = center + yDomainAbs;
-            yDomainMin = center - yDomainAbs;
-        }
-        // add padding for data label
-        if (showHorizontalDataLabel) {
-            lengths = $$.getDataLabelLength(yDomainMin, yDomainMax, 'width');
-            diff = diffDomain($$.y.range());
-            ratio = [lengths[0] / diff, lengths[1] / diff];
-            padding_top += domainLength * (ratio[1] / (1 - ratio[0] - ratio[1]));
-            padding_bottom += domainLength * (ratio[0] / (1 - ratio[0] - ratio[1]));
-        } else if (showVerticalDataLabel) {
-            lengths = $$.getDataLabelLength(yDomainMin, yDomainMax, 'height');
-            padding_top += $$.axis.convertPixelsToAxisPadding(lengths[1], domainLength);
-            padding_bottom += $$.axis.convertPixelsToAxisPadding(lengths[0], domainLength);
-        }
-        if (axisId === 'y' && notEmpty(config.axis_y_padding)) {
-            padding_top = $$.axis.getPadding(config.axis_y_padding, 'top', padding_top, domainLength);
-            padding_bottom = $$.axis.getPadding(config.axis_y_padding, 'bottom', padding_bottom, domainLength);
-        }
-        if (axisId === 'y2' && notEmpty(config.axis_y2_padding)) {
-            padding_top = $$.axis.getPadding(config.axis_y2_padding, 'top', padding_top, domainLength);
-            padding_bottom = $$.axis.getPadding(config.axis_y2_padding, 'bottom', padding_bottom, domainLength);
-        }
-        // Bar/Area chart should be 0-based if all positive|negative
-        if (isZeroBased) {
-            if (isAllPositive) {
-                padding_bottom = yDomainMin;
-            }
-            if (isAllNegative) {
-                padding_top = -yDomainMax;
-            }
-        }
-        domain = [yDomainMin - padding_bottom, yDomainMax + padding_top];
-        return isInverted ? domain.reverse() : domain;
-    };
-    c3_chart_internal_fn.getXDomainMin = function (targets) {
-        var $$ = this,
-            config = $$.config;
-        return isDefined(config.axis_x_min) ? $$.isTimeSeries() ? this.parseDate(config.axis_x_min) : config.axis_x_min : $$.d3.min(targets, function (t) {
-            return $$.d3.min(t.values, function (v) {
-                return v.x;
-            });
-        });
-    };
-    c3_chart_internal_fn.getXDomainMax = function (targets) {
-        var $$ = this,
-            config = $$.config;
-        return isDefined(config.axis_x_max) ? $$.isTimeSeries() ? this.parseDate(config.axis_x_max) : config.axis_x_max : $$.d3.max(targets, function (t) {
-            return $$.d3.max(t.values, function (v) {
-                return v.x;
-            });
-        });
-    };
-    c3_chart_internal_fn.getXDomainPadding = function (domain) {
-        var $$ = this,
-            config = $$.config,
-            diff = domain[1] - domain[0],
-            maxDataCount,
-            padding,
-            paddingLeft,
-            paddingRight;
-        if ($$.isCategorized()) {
-            padding = 0;
-        } else if ($$.hasType('bar')) {
-            maxDataCount = $$.getMaxDataCount();
-            padding = maxDataCount > 1 ? diff / (maxDataCount - 1) / 2 : 0.5;
-        } else {
-            padding = diff * 0.01;
-        }
-        if (_typeof(config.axis_x_padding) === 'object' && notEmpty(config.axis_x_padding)) {
-            paddingLeft = isValue(config.axis_x_padding.left) ? config.axis_x_padding.left : padding;
-            paddingRight = isValue(config.axis_x_padding.right) ? config.axis_x_padding.right : padding;
-        } else if (typeof config.axis_x_padding === 'number') {
-            paddingLeft = paddingRight = config.axis_x_padding;
-        } else {
-            paddingLeft = paddingRight = padding;
-        }
-        return { left: paddingLeft, right: paddingRight };
-    };
-    c3_chart_internal_fn.getXDomain = function (targets) {
-        var $$ = this,
-            xDomain = [$$.getXDomainMin(targets), $$.getXDomainMax(targets)],
-            firstX = xDomain[0],
-            lastX = xDomain[1],
-            padding = $$.getXDomainPadding(xDomain),
-            min = 0,
-            max = 0;
-        // show center of x domain if min and max are the same
-        if (firstX - lastX === 0 && !$$.isCategorized()) {
-            if ($$.isTimeSeries()) {
-                firstX = new Date(firstX.getTime() * 0.5);
-                lastX = new Date(lastX.getTime() * 1.5);
-            } else {
-                firstX = firstX === 0 ? 1 : firstX * 0.5;
-                lastX = lastX === 0 ? -1 : lastX * 1.5;
-            }
-        }
-        if (firstX || firstX === 0) {
-            min = $$.isTimeSeries() ? new Date(firstX.getTime() - padding.left) : firstX - padding.left;
-        }
-        if (lastX || lastX === 0) {
-            max = $$.isTimeSeries() ? new Date(lastX.getTime() + padding.right) : lastX + padding.right;
-        }
-        return [min, max];
-    };
-    c3_chart_internal_fn.updateXDomain = function (targets, withUpdateXDomain, withUpdateOrgXDomain, withTrim, domain) {
-        var $$ = this,
-            config = $$.config;
-
-        if (withUpdateOrgXDomain) {
-            $$.x.domain(domain ? domain : $$.d3.extent($$.getXDomain(targets)));
-            $$.orgXDomain = $$.x.domain();
-            if (config.zoom_enabled) {
-                $$.zoom.update();
-            }
-            $$.subX.domain($$.x.domain());
-            if ($$.brush) {
-                $$.brush.updateScale($$.subX);
-            }
-        }
-        if (withUpdateXDomain) {
-            $$.x.domain(domain ? domain : !$$.brush || $$.brush.empty() ? $$.orgXDomain : $$.brush.selectionAsValue());
-        }
-
-        // Trim domain when too big by zoom mousemove event
-        if (withTrim) {
-            $$.x.domain($$.trimXDomain($$.x.orgDomain()));
-        }
-
-        return $$.x.domain();
-    };
-    c3_chart_internal_fn.trimXDomain = function (domain) {
-        var zoomDomain = this.getZoomDomain(),
-            min = zoomDomain[0],
-            max = zoomDomain[1];
-        if (domain[0] <= min) {
-            domain[1] = +domain[1] + (min - domain[0]);
-            domain[0] = min;
-        }
-        if (max <= domain[1]) {
-            domain[0] = +domain[0] - (domain[1] - max);
-            domain[1] = max;
-        }
-        return domain;
-    };
-
-    c3_chart_internal_fn.drag = function (mouse) {
-        var $$ = this,
-            config = $$.config,
-            main = $$.main,
-            d3 = $$.d3;
-        var sx, sy, mx, my, minX, maxX, minY, maxY;
-
-        if ($$.hasArcType()) {
-            return;
-        }
-        if (!config.data_selection_enabled) {
-            return;
-        } // do nothing if not selectable
-        if (!config.data_selection_multiple) {
-            return;
-        } // skip when single selection because drag is used for multiple selection
-
-        sx = $$.dragStart[0];
-        sy = $$.dragStart[1];
-        mx = mouse[0];
-        my = mouse[1];
-        minX = Math.min(sx, mx);
-        maxX = Math.max(sx, mx);
-        minY = config.data_selection_grouped ? $$.margin.top : Math.min(sy, my);
-        maxY = config.data_selection_grouped ? $$.height : Math.max(sy, my);
-
-        main.select('.' + CLASS.dragarea).attr('x', minX).attr('y', minY).attr('width', maxX - minX).attr('height', maxY - minY);
-        // TODO: binary search when multiple xs
-        main.selectAll('.' + CLASS.shapes).selectAll('.' + CLASS.shape).filter(function (d) {
-            return config.data_selection_isselectable(d);
-        }).each(function (d, i) {
-            var shape = d3.select(this),
-                isSelected = shape.classed(CLASS.SELECTED),
-                isIncluded = shape.classed(CLASS.INCLUDED),
-                _x,
-                _y,
-                _w,
-                _h,
-                toggle,
-                isWithin = false,
-                box;
-            if (shape.classed(CLASS.circle)) {
-                _x = shape.attr("cx") * 1;
-                _y = shape.attr("cy") * 1;
-                toggle = $$.togglePoint;
-                isWithin = minX < _x && _x < maxX && minY < _y && _y < maxY;
-            } else if (shape.classed(CLASS.bar)) {
-                box = getPathBox(this);
-                _x = box.x;
-                _y = box.y;
-                _w = box.width;
-                _h = box.height;
-                toggle = $$.togglePath;
-                isWithin = !(maxX < _x || _x + _w < minX) && !(maxY < _y || _y + _h < minY);
-            } else {
-                // line/area selection not supported yet
-                return;
-            }
-            if (isWithin ^ isIncluded) {
-                shape.classed(CLASS.INCLUDED, !isIncluded);
-                // TODO: included/unincluded callback here
-                shape.classed(CLASS.SELECTED, !isSelected);
-                toggle.call($$, !isSelected, shape, d, i);
-            }
-        });
-    };
-
-    c3_chart_internal_fn.dragstart = function (mouse) {
-        var $$ = this,
-            config = $$.config;
-        if ($$.hasArcType()) {
-            return;
-        }
-        if (!config.data_selection_enabled) {
-            return;
-        } // do nothing if not selectable
-        $$.dragStart = mouse;
-        $$.main.select('.' + CLASS.chart).append('rect').attr('class', CLASS.dragarea).style('opacity', 0.1);
-        $$.dragging = true;
-    };
-
-    c3_chart_internal_fn.dragend = function () {
-        var $$ = this,
-            config = $$.config;
-        if ($$.hasArcType()) {
-            return;
-        }
-        if (!config.data_selection_enabled) {
-            return;
-        } // do nothing if not selectable
-        $$.main.select('.' + CLASS.dragarea).transition().duration(100).style('opacity', 0).remove();
-        $$.main.selectAll('.' + CLASS.shape).classed(CLASS.INCLUDED, false);
-        $$.dragging = false;
-    };
-
-    c3_chart_internal_fn.getYFormat = function (forArc) {
-        var $$ = this,
-            formatForY = forArc && !$$.hasType('gauge') ? $$.defaultArcValueFormat : $$.yFormat,
-            formatForY2 = forArc && !$$.hasType('gauge') ? $$.defaultArcValueFormat : $$.y2Format;
-        return function (v, ratio, id) {
-            var format = $$.axis.getId(id) === 'y2' ? formatForY2 : formatForY;
-            return format.call($$, v, ratio);
-        };
-    };
-    c3_chart_internal_fn.yFormat = function (v) {
-        var $$ = this,
-            config = $$.config,
-            format = config.axis_y_tick_format ? config.axis_y_tick_format : $$.defaultValueFormat;
-        return format(v);
-    };
-    c3_chart_internal_fn.y2Format = function (v) {
-        var $$ = this,
-            config = $$.config,
-            format = config.axis_y2_tick_format ? config.axis_y2_tick_format : $$.defaultValueFormat;
-        return format(v);
-    };
-    c3_chart_internal_fn.defaultValueFormat = function (v) {
-        return isValue(v) ? +v : "";
-    };
-    c3_chart_internal_fn.defaultArcValueFormat = function (v, ratio) {
-        return (ratio * 100).toFixed(1) + '%';
-    };
-    c3_chart_internal_fn.dataLabelFormat = function (targetId) {
-        var $$ = this,
-            data_labels = $$.config.data_labels,
-            format,
-            defaultFormat = function defaultFormat(v) {
-            return isValue(v) ? +v : "";
-        };
-        // find format according to axis id
-        if (typeof data_labels.format === 'function') {
-            format = data_labels.format;
-        } else if (_typeof(data_labels.format) === 'object') {
-            if (data_labels.format[targetId]) {
-                format = data_labels.format[targetId] === true ? defaultFormat : data_labels.format[targetId];
-            } else {
-                format = function format() {
-                    return '';
-                };
-            }
-        } else {
-            format = defaultFormat;
-        }
-        return format;
-    };
-
-    c3_chart_internal_fn.initGrid = function () {
-        var $$ = this,
-            config = $$.config,
-            d3 = $$.d3;
-        $$.grid = $$.main.append('g').attr("clip-path", $$.clipPathForGrid).attr('class', CLASS.grid);
-        if (config.grid_x_show) {
-            $$.grid.append("g").attr("class", CLASS.xgrids);
-        }
-        if (config.grid_y_show) {
-            $$.grid.append('g').attr('class', CLASS.ygrids);
-        }
-        if (config.grid_focus_show) {
-            $$.grid.append('g').attr("class", CLASS.xgridFocus).append('line').attr('class', CLASS.xgridFocus);
-        }
-        $$.xgrid = d3.selectAll([]);
-        if (!config.grid_lines_front) {
-            $$.initGridLines();
-        }
-    };
-    c3_chart_internal_fn.initGridLines = function () {
-        var $$ = this,
-            d3 = $$.d3;
-        $$.gridLines = $$.main.append('g').attr("clip-path", $$.clipPathForGrid).attr('class', CLASS.grid + ' ' + CLASS.gridLines);
-        $$.gridLines.append('g').attr("class", CLASS.xgridLines);
-        $$.gridLines.append('g').attr('class', CLASS.ygridLines);
-        $$.xgridLines = d3.selectAll([]);
-    };
-    c3_chart_internal_fn.updateXGrid = function (withoutUpdate) {
-        var $$ = this,
-            config = $$.config,
-            d3 = $$.d3,
-            xgridData = $$.generateGridData(config.grid_x_type, $$.x),
-            tickOffset = $$.isCategorized() ? $$.xAxis.tickOffset() : 0;
-
-        $$.xgridAttr = config.axis_rotated ? {
-            'x1': 0,
-            'x2': $$.width,
-            'y1': function y1(d) {
-                return $$.x(d) - tickOffset;
-            },
-            'y2': function y2(d) {
-                return $$.x(d) - tickOffset;
-            }
-        } : {
-            'x1': function x1(d) {
-                return $$.x(d) + tickOffset;
-            },
-            'x2': function x2(d) {
-                return $$.x(d) + tickOffset;
-            },
-            'y1': 0,
-            'y2': $$.height
-        };
-        $$.xgridAttr.opacity = function () {
-            var pos = +d3.select(this).attr(config.axis_rotated ? 'y1' : 'x1');
-            return pos === (config.axis_rotated ? $$.height : 0) ? 0 : 1;
-        };
-
-        var xgrid = $$.main.select('.' + CLASS.xgrids).selectAll('.' + CLASS.xgrid).data(xgridData);
-        var xgridEnter = xgrid.enter().append('line').attr("class", CLASS.xgrid).attr('x1', $$.xgridAttr.x1).attr('x2', $$.xgridAttr.x2).attr('y1', $$.xgridAttr.y1).attr('y2', $$.xgridAttr.y2).style("opacity", 0);
-        $$.xgrid = xgridEnter.merge(xgrid);
-        if (!withoutUpdate) {
-            $$.xgrid.attr('x1', $$.xgridAttr.x1).attr('x2', $$.xgridAttr.x2).attr('y1', $$.xgridAttr.y1).attr('y2', $$.xgridAttr.y2).style("opacity", $$.xgridAttr.opacity);
-        }
-        xgrid.exit().remove();
-    };
-
-    c3_chart_internal_fn.updateYGrid = function () {
-        var $$ = this,
-            config = $$.config,
-            gridValues = $$.yAxis.tickValues() || $$.y.ticks(config.grid_y_ticks);
-        var ygrid = $$.main.select('.' + CLASS.ygrids).selectAll('.' + CLASS.ygrid).data(gridValues);
-        var ygridEnter = ygrid.enter().append('line')
-        // TODO: x1, x2, y1, y2, opacity need to be set here maybe
-        .attr('class', CLASS.ygrid);
-        $$.ygrid = ygridEnter.merge(ygrid);
-        $$.ygrid.attr("x1", config.axis_rotated ? $$.y : 0).attr("x2", config.axis_rotated ? $$.y : $$.width).attr("y1", config.axis_rotated ? 0 : $$.y).attr("y2", config.axis_rotated ? $$.height : $$.y);
-        ygrid.exit().remove();
-        $$.smoothLines($$.ygrid, 'grid');
-    };
-
-    c3_chart_internal_fn.gridTextAnchor = function (d) {
-        return d.position ? d.position : "end";
-    };
-    c3_chart_internal_fn.gridTextDx = function (d) {
-        return d.position === 'start' ? 4 : d.position === 'middle' ? 0 : -4;
-    };
-    c3_chart_internal_fn.xGridTextX = function (d) {
-        return d.position === 'start' ? -this.height : d.position === 'middle' ? -this.height / 2 : 0;
-    };
-    c3_chart_internal_fn.yGridTextX = function (d) {
-        return d.position === 'start' ? 0 : d.position === 'middle' ? this.width / 2 : this.width;
-    };
-    c3_chart_internal_fn.updateGrid = function (duration) {
-        var $$ = this,
-            main = $$.main,
-            config = $$.config,
-            xgridLine,
-            xgridLineEnter,
-            ygridLine,
-            ygridLineEnter,
-            xv = $$.xv.bind($$),
-            yv = $$.yv.bind($$),
-            xGridTextX = $$.xGridTextX.bind($$),
-            yGridTextX = $$.yGridTextX.bind($$);
-
-        // hide if arc type
-        $$.grid.style('visibility', $$.hasArcType() ? 'hidden' : 'visible');
-
-        main.select('line.' + CLASS.xgridFocus).style("visibility", "hidden");
-        if (config.grid_x_show) {
-            $$.updateXGrid();
-        }
-        xgridLine = main.select('.' + CLASS.xgridLines).selectAll('.' + CLASS.xgridLine).data(config.grid_x_lines);
-        // enter
-        xgridLineEnter = xgridLine.enter().append('g').attr("class", function (d) {
-            return CLASS.xgridLine + (d['class'] ? ' ' + d['class'] : '');
-        });
-        xgridLineEnter.append('line').attr("x1", config.axis_rotated ? 0 : xv).attr("x2", config.axis_rotated ? $$.width : xv).attr("y1", config.axis_rotated ? xv : 0).attr("y2", config.axis_rotated ? xv : $$.height).style("opacity", 0);
-        xgridLineEnter.append('text').attr("text-anchor", $$.gridTextAnchor).attr("transform", config.axis_rotated ? "" : "rotate(-90)").attr("x", config.axis_rotated ? yGridTextX : xGridTextX).attr("y", xv).attr('dx', $$.gridTextDx).attr('dy', -5).style("opacity", 0);
-        // udpate
-        $$.xgridLines = xgridLineEnter.merge(xgridLine);
-        // done in d3.transition() of the end of this function
-        // exit
-        xgridLine.exit().transition().duration(duration).style("opacity", 0).remove();
-
-        // Y-Grid
-        if (config.grid_y_show) {
-            $$.updateYGrid();
-        }
-        ygridLine = main.select('.' + CLASS.ygridLines).selectAll('.' + CLASS.ygridLine).data(config.grid_y_lines);
-        // enter
-        ygridLineEnter = ygridLine.enter().append('g').attr("class", function (d) {
-            return CLASS.ygridLine + (d['class'] ? ' ' + d['class'] : '');
-        });
-        ygridLineEnter.append('line').attr("x1", config.axis_rotated ? yv : 0).attr("x2", config.axis_rotated ? yv : $$.width).attr("y1", config.axis_rotated ? 0 : yv).attr("y2", config.axis_rotated ? $$.height : yv).style("opacity", 0);
-        ygridLineEnter.append('text').attr("text-anchor", $$.gridTextAnchor).attr("transform", config.axis_rotated ? "rotate(-90)" : "").attr("x", config.axis_rotated ? xGridTextX : yGridTextX).attr("y", yv).attr('dx', $$.gridTextDx).attr('dy', -5).style("opacity", 0);
-        // update
-        $$.ygridLines = ygridLineEnter.merge(ygridLine);
-        $$.ygridLines.select('line').transition().duration(duration).attr("x1", config.axis_rotated ? yv : 0).attr("x2", config.axis_rotated ? yv : $$.width).attr("y1", config.axis_rotated ? 0 : yv).attr("y2", config.axis_rotated ? $$.height : yv).style("opacity", 1);
-        $$.ygridLines.select('text').transition().duration(duration).attr("x", config.axis_rotated ? $$.xGridTextX.bind($$) : $$.yGridTextX.bind($$)).attr("y", yv).text(function (d) {
-            return d.text;
-        }).style("opacity", 1);
-        // exit
-        ygridLine.exit().transition().duration(duration).style("opacity", 0).remove();
-    };
-    c3_chart_internal_fn.redrawGrid = function (withTransition, transition) {
-        var $$ = this,
-            config = $$.config,
-            xv = $$.xv.bind($$),
-            lines = $$.xgridLines.select('line'),
-            texts = $$.xgridLines.select('text');
-        return [(withTransition ? lines.transition(transition) : lines).attr("x1", config.axis_rotated ? 0 : xv).attr("x2", config.axis_rotated ? $$.width : xv).attr("y1", config.axis_rotated ? xv : 0).attr("y2", config.axis_rotated ? xv : $$.height).style("opacity", 1), (withTransition ? texts.transition(transition) : texts).attr("x", config.axis_rotated ? $$.yGridTextX.bind($$) : $$.xGridTextX.bind($$)).attr("y", xv).text(function (d) {
-            return d.text;
-        }).style("opacity", 1)];
-    };
-    c3_chart_internal_fn.showXGridFocus = function (selectedData) {
-        var $$ = this,
-            config = $$.config,
-            dataToShow = selectedData.filter(function (d) {
-            return d && isValue(d.value);
-        }),
-            focusEl = $$.main.selectAll('line.' + CLASS.xgridFocus),
-            xx = $$.xx.bind($$);
-        if (!config.tooltip_show) {
-            return;
-        }
-        // Hide when scatter plot exists
-        if ($$.hasType('scatter') || $$.hasArcType()) {
-            return;
-        }
-        focusEl.style("visibility", "visible").data([dataToShow[0]]).attr(config.axis_rotated ? 'y1' : 'x1', xx).attr(config.axis_rotated ? 'y2' : 'x2', xx);
-        $$.smoothLines(focusEl, 'grid');
-    };
-    c3_chart_internal_fn.hideXGridFocus = function () {
-        this.main.select('line.' + CLASS.xgridFocus).style("visibility", "hidden");
-    };
-    c3_chart_internal_fn.updateXgridFocus = function () {
-        var $$ = this,
-            config = $$.config;
-        $$.main.select('line.' + CLASS.xgridFocus).attr("x1", config.axis_rotated ? 0 : -10).attr("x2", config.axis_rotated ? $$.width : -10).attr("y1", config.axis_rotated ? -10 : 0).attr("y2", config.axis_rotated ? -10 : $$.height);
-    };
-    c3_chart_internal_fn.generateGridData = function (type, scale) {
-        var $$ = this,
-            gridData = [],
-            xDomain,
-            firstYear,
-            lastYear,
-            i,
-            tickNum = $$.main.select("." + CLASS.axisX).selectAll('.tick').size();
-        if (type === 'year') {
-            xDomain = $$.getXDomain();
-            firstYear = xDomain[0].getFullYear();
-            lastYear = xDomain[1].getFullYear();
-            for (i = firstYear; i <= lastYear; i++) {
-                gridData.push(new Date(i + '-01-01 00:00:00'));
-            }
-        } else {
-            gridData = scale.ticks(10);
-            if (gridData.length > tickNum) {
-                // use only int
-                gridData = gridData.filter(function (d) {
-                    return ("" + d).indexOf('.') < 0;
-                });
-            }
-        }
-        return gridData;
-    };
-    c3_chart_internal_fn.getGridFilterToRemove = function (params) {
-        return params ? function (line) {
-            var found = false;
-            [].concat(params).forEach(function (param) {
-                if ('value' in param && line.value === param.value || 'class' in param && line['class'] === param['class']) {
-                    found = true;
-                }
-            });
-            return found;
-        } : function () {
-            return true;
-        };
-    };
-    c3_chart_internal_fn.removeGridLines = function (params, forX) {
-        var $$ = this,
-            config = $$.config,
-            toRemove = $$.getGridFilterToRemove(params),
-            toShow = function toShow(line) {
-            return !toRemove(line);
-        },
-            classLines = forX ? CLASS.xgridLines : CLASS.ygridLines,
-            classLine = forX ? CLASS.xgridLine : CLASS.ygridLine;
-        $$.main.select('.' + classLines).selectAll('.' + classLine).filter(toRemove).transition().duration(config.transition_duration).style('opacity', 0).remove();
-        if (forX) {
-            config.grid_x_lines = config.grid_x_lines.filter(toShow);
-        } else {
-            config.grid_y_lines = config.grid_y_lines.filter(toShow);
-        }
-    };
-
-    c3_chart_internal_fn.initEventRect = function () {
-        var $$ = this,
-            config = $$.config;
-
-        $$.main.select('.' + CLASS.chart).append("g").attr("class", CLASS.eventRects).style('fill-opacity', 0);
-        $$.eventRect = $$.main.select('.' + CLASS.eventRects).append('rect').attr('class', CLASS.eventRect);
-
-        // event rect handle zoom event as well
-        if (config.zoom_enabled && $$.zoom) {
-            $$.eventRect.call($$.zoom).on("dblclick.zoom", null);
-            if (config.zoom_initialRange) {
-                // WORKAROUND: Add transition to apply transform immediately when no subchart
-                $$.eventRect.transition().duration(0).call($$.zoom.transform, $$.zoomTransform(config.zoom_initialRange));
-            }
-        }
-    };
-    c3_chart_internal_fn.redrawEventRect = function () {
-        var $$ = this,
-            d3 = $$.d3,
-            config = $$.config,
-            x,
-            y,
-            w,
-            h;
-
-        // TODO: rotated not supported yet
-        x = 0;
-        y = 0;
-        w = $$.width;
-        h = $$.height;
-
-        function mouseout() {
-            $$.svg.select('.' + CLASS.eventRect).style('cursor', null);
-            $$.hideXGridFocus();
-            $$.hideTooltip();
-            $$.unexpandCircles();
-            $$.unexpandBars();
-        }
-
-        // rects for mouseover
-        $$.main.select('.' + CLASS.eventRects).style('cursor', config.zoom_enabled ? config.axis_rotated ? 'ns-resize' : 'ew-resize' : null);
-
-        $$.eventRect.attr('x', x).attr('y', y).attr('width', w).attr('height', h).on('mouseout', config.interaction_enabled ? function () {
-            if (!config) {
-                return;
-            } // chart is destroyed
-            if ($$.hasArcType()) {
-                return;
-            }
-            mouseout();
-        } : null).on('mousemove', config.interaction_enabled ? function () {
-            var targetsToShow, mouse, closest, sameXData, selectedData;
-
-            if ($$.dragging) {
-                return;
-            } // do nothing when dragging
-            if ($$.hasArcType(targetsToShow)) {
-                return;
-            }
-
-            targetsToShow = $$.filterTargetsToShow($$.data.targets);
-            mouse = d3.mouse(this);
-            closest = $$.findClosestFromTargets(targetsToShow, mouse);
-
-            if ($$.mouseover && (!closest || closest.id !== $$.mouseover.id)) {
-                config.data_onmouseout.call($$.api, $$.mouseover);
-                $$.mouseover = undefined;
-            }
-
-            if (!closest) {
-                mouseout();
-                return;
-            }
-
-            if ($$.isScatterType(closest) || !config.tooltip_grouped) {
-                sameXData = [closest];
-            } else {
-                sameXData = $$.filterByX(targetsToShow, closest.x);
-            }
-
-            // show tooltip when cursor is close to some point
-            selectedData = sameXData.map(function (d) {
-                return $$.addName(d);
-            });
-            $$.showTooltip(selectedData, this);
-
-            // expand points
-            if (config.point_focus_expand_enabled) {
-                $$.unexpandCircles();
-                selectedData.forEach(function (d) {
-                    $$.expandCircles(d.index, d.id, false);
-                });
-            }
-            $$.expandBars(closest.index, closest.id, true);
-
-            // Show xgrid focus line
-            $$.showXGridFocus(selectedData);
-
-            // Show cursor as pointer if point is close to mouse position
-            if ($$.isBarType(closest.id) || $$.dist(closest, mouse) < config.point_sensitivity) {
-                $$.svg.select('.' + CLASS.eventRect).style('cursor', 'pointer');
-                if (!$$.mouseover) {
-                    config.data_onmouseover.call($$.api, closest);
-                    $$.mouseover = closest;
-                }
-            }
-        } : null).on('click', config.interaction_enabled ? function () {
-            var targetsToShow, mouse, closest, sameXData;
-            if ($$.hasArcType(targetsToShow)) {
-                return;
-            }
-
-            targetsToShow = $$.filterTargetsToShow($$.data.targets);
-            mouse = d3.mouse(this);
-            closest = $$.findClosestFromTargets(targetsToShow, mouse);
-            if (!closest) {
-                return;
-            }
-            // select if selection enabled
-            if ($$.isBarType(closest.id) || $$.dist(closest, mouse) < config.point_sensitivity) {
-                if ($$.isScatterType(closest) || !config.data_selection_grouped) {
-                    sameXData = [closest];
-                } else {
-                    sameXData = $$.filterByX(targetsToShow, closest.x);
-                }
-                sameXData.forEach(function (d) {
-                    $$.main.selectAll('.' + CLASS.shapes + $$.getTargetSelectorSuffix(d.id)).selectAll('.' + CLASS.shape + '-' + d.index).each(function () {
-                        if (config.data_selection_grouped || $$.isWithinShape(this, d)) {
-                            $$.toggleShape(this, d, d.index);
-                            config.data_onclick.call($$.api, d, this);
-                        }
-                    });
-                });
-            }
-        } : null).call(config.interaction_enabled && config.data_selection_draggable && $$.drag ? d3.drag().on('drag', function () {
-            $$.drag(d3.mouse(this));
-        }).on('start', function () {
-            $$.dragstart(d3.mouse(this));
-        }).on('end', function () {
-            $$.dragend();
-        }) : function () {});
-    };
-    c3_chart_internal_fn.getMousePosition = function (data) {
-        var $$ = this;
-        return [$$.x(data.x), $$.getYScale(data.id)(data.value)];
-    };
-    c3_chart_internal_fn.dispatchEvent = function (type, mouse) {
-        var $$ = this,
-            selector = '.' + CLASS.eventRect,
-            eventRect = $$.main.select(selector).node(),
-            box = eventRect.getBoundingClientRect(),
-            x = box.left + (mouse ? mouse[0] : 0),
-            y = box.top + (mouse ? mouse[1] : 0),
-            event = document.createEvent("MouseEvents");
-
-        event.initMouseEvent(type, true, true, window, 0, x, y, x, y, false, false, false, false, 0, null);
-        eventRect.dispatchEvent(event);
-    };
-
-    c3_chart_internal_fn.initLegend = function () {
-        var $$ = this;
-        $$.legendItemTextBox = {};
-        $$.legendHasRendered = false;
-        $$.legend = $$.svg.append("g").attr("transform", $$.getTranslate('legend'));
-        if (!$$.config.legend_show) {
-            $$.legend.style('visibility', 'hidden');
-            $$.hiddenLegendIds = $$.mapToIds($$.data.targets);
-            return;
-        }
-        // MEMO: call here to update legend box and tranlate for all
-        // MEMO: translate will be upated by this, so transform not needed in updateLegend()
-        $$.updateLegendWithDefaults();
-    };
-    c3_chart_internal_fn.updateLegendWithDefaults = function () {
-        var $$ = this;
-        $$.updateLegend($$.mapToIds($$.data.targets), { withTransform: false, withTransitionForTransform: false, withTransition: false });
-    };
-    c3_chart_internal_fn.updateSizeForLegend = function (legendHeight, legendWidth) {
-        var $$ = this,
-            config = $$.config,
-            insetLegendPosition = {
-            top: $$.isLegendTop ? $$.getCurrentPaddingTop() + config.legend_inset_y + 5.5 : $$.currentHeight - legendHeight - $$.getCurrentPaddingBottom() - config.legend_inset_y,
-            left: $$.isLegendLeft ? $$.getCurrentPaddingLeft() + config.legend_inset_x + 0.5 : $$.currentWidth - legendWidth - $$.getCurrentPaddingRight() - config.legend_inset_x + 0.5
-        };
-
-        $$.margin3 = {
-            top: $$.isLegendRight ? 0 : $$.isLegendInset ? insetLegendPosition.top : $$.currentHeight - legendHeight,
-            right: NaN,
-            bottom: 0,
-            left: $$.isLegendRight ? $$.currentWidth - legendWidth : $$.isLegendInset ? insetLegendPosition.left : 0
-        };
-    };
-    c3_chart_internal_fn.transformLegend = function (withTransition) {
-        var $$ = this;
-        (withTransition ? $$.legend.transition() : $$.legend).attr("transform", $$.getTranslate('legend'));
-    };
-    c3_chart_internal_fn.updateLegendStep = function (step) {
-        this.legendStep = step;
-    };
-    c3_chart_internal_fn.updateLegendItemWidth = function (w) {
-        this.legendItemWidth = w;
-    };
-    c3_chart_internal_fn.updateLegendItemHeight = function (h) {
-        this.legendItemHeight = h;
-    };
-    c3_chart_internal_fn.getLegendWidth = function () {
-        var $$ = this;
-        return $$.config.legend_show ? $$.isLegendRight || $$.isLegendInset ? $$.legendItemWidth * ($$.legendStep + 1) : $$.currentWidth : 0;
-    };
-    c3_chart_internal_fn.getLegendHeight = function () {
-        var $$ = this,
-            h = 0;
-        if ($$.config.legend_show) {
-            if ($$.isLegendRight) {
-                h = $$.currentHeight;
-            } else {
-                h = Math.max(20, $$.legendItemHeight) * ($$.legendStep + 1);
-            }
-