Merge branch 'web'
authorgregor herrmann <gregor@toastfreeware.priv.at>
Thu, 22 Nov 2018 23:34:23 +0000 (00:34 +0100)
committergregor herrmann <gregor@toastfreeware.priv.at>
Thu, 22 Nov 2018 23:34:23 +0000 (00:34 +0100)
14 files changed:
seepark_webapp [new file with mode: 0755]
web/README [new file with mode: 0644]
web/seepark_web.py [new file with mode: 0644]
web/static/c3.css [new file with mode: 0644]
web/static/c3.js [new file with mode: 0644]
web/static/c3.min.css [new file with mode: 0644]
web/static/c3.min.js [new file with mode: 0644]
web/static/d3.js [new file with mode: 0644]
web/static/d3.min.js [new file with mode: 0644]
web/static/seepark_web.css [new file with mode: 0644]
web/static/seepark_web.js [new file with mode: 0644]
web/static/strftime-min.js [new file with mode: 0644]
web/static/strftime.js [new file with mode: 0644]
web/templates/seepark_web.html [new file with mode: 0644]

diff --git a/seepark_webapp b/seepark_webapp
new file mode 100755 (executable)
index 0000000..c7a57fa
--- /dev/null
@@ -0,0 +1,50 @@
+#!/bin/sh
+
+die() {
+       echo "$1" >&2
+       usage
+       exit 1
+}
+
+usage() {
+       echo "Usage: ./$ME <start|stop|restart>." >&2
+}
+
+ME=$(basename $0)
+DIR=$(dirname $0)
+ARG=$1
+
+set -eu
+
+[ -n "$ARG" ] || die "Missing argument."
+
+start() {
+       cd "$DIR/web"
+       SEEPARKINI=../../seewasser.ini waitress-serve --listen=[::1]:8765 'seepark_web:app' &
+}
+
+stop() {
+       killall waitress-serve
+}
+
+case "$ARG" in
+       start)
+               start
+               ;;
+       stop)
+               stop
+               ;;
+       restart)
+               stop
+               sleep 1
+               start
+               ;;
+       help|-h|--help)
+               usage
+               ;;
+       *)
+               die "Unknown argument '$ARG'." >&2
+               ;;
+esac
+
+exit $?
diff --git a/web/README b/web/README
new file mode 100644 (file)
index 0000000..0ac72d1
--- /dev/null
@@ -0,0 +1,36 @@
+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
+(or :: instead of 0.0.0.0 for ipv4+ipv6)
+
+
+Go to:
+http://127.0.0.1:5000/
+or http://<ipaddress>:5000/
+if the app is running on a different machine
+
+---
+
+notes on a "production" server:
+
+needed: python3-waitress
+
+run (in folder web):
+SEEPARKINI=~/seewasser.ini waitress-serve --port 8765 'seepark_web:app'
+
+links:
+
+http://flask.pocoo.org/docs/1.0/tutorial/deploy/
+http://flask.pocoo.org/docs/1.0/tutorial/factory/
+https://github.com/pallets/flask/blob/1.0.2/examples/tutorial/flaskr/__init__.py
+
+https://docs.pylonsproject.org/projects/waitress/en/latest/
+https://docs.pylonsproject.org/projects/waitress/en/latest/runner.html#runner
+
+https://gr33ndata.blogspot.com/2012/01/waitress-flask.html
diff --git a/web/seepark_web.py b/web/seepark_web.py
new file mode 100644 (file)
index 0000000..b4c7749
--- /dev/null
@@ -0,0 +1,289 @@
+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
+from sqlalchemy import func
+
+
+# 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('webapp', '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 calc_grouping_resolution(begin, end):
+    """How many data points should be between the timestamps begin and end?"""
+    # copied from munin/master/_bin/munin-cgi-graph.in
+    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']
+    return resolution
+
+
+def select_sensordata(sensor_id, sensor_type, begin, end):
+    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)
+    return query.all()
+
+
+def select_sensordata_grouped(sensor_id, sensor_type, begin, end):
+    # determine resolution (interval in seconds for data points)
+    resolution = calc_grouping_resolution(begin, end)
+
+    # Let the database do the grouping. Example in SQL (MySQL):
+    # 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;
+    query = db.session.query(func.to_seconds(Sensors.timestamp).op('div')(resolution).label('g'),
+            func.from_unixtime(func.avg(func.unix_timestamp(Sensors.timestamp))).label('timestamp'),
+            func.avg(Sensors.value).label('value'),
+            Sensors.sensor_id, Sensors.value_type, Sensors.sensor_name)
+    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)
+    query = query.filter(Sensors.timestamp >= begin)
+    query = query.filter(Sensors.timestamp <= end)
+    query = query.group_by('g', Sensors.sensor_id, Sensors.value_type, Sensors.sensor_name)
+    return query.all()
+
+
+def select_openweatherdata(cityid, begin, end):
+    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)
+    return query.all()
+
+
+def select_openweatherdata_grouped(cityid, begin, end):
+    # determine resolution (interval in seconds for data points)
+    resolution = calc_grouping_resolution(begin, end)
+
+    # Let the database do the grouping. Example in SQL (MySQL):
+    # 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;
+    query = db.session.query(func.to_seconds(OpenWeatherMap.datetime).op('div')(resolution).label('g'),
+            func.from_unixtime(func.avg(func.unix_timestamp(OpenWeatherMap.datetime))).label('datetime'),
+            func.avg(OpenWeatherMap.temp).label('temp'),
+            OpenWeatherMap.cityid)
+    OpenWeatherMap.query.filter(OpenWeatherMap.cityid == cityid)
+    query = query.filter(OpenWeatherMap.datetime >= begin)
+    query = query.filter(OpenWeatherMap.datetime <= end)
+    query = query.group_by('g', OpenWeatherMap.cityid)
+    return query.all()
+
+
+def convert_to_c3(result, id, field_x, field_y):
+    c3result = defaultdict(list)
+    for row in result:
+        c3result[str(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')
+
+    if mode == 'full':
+        result = select_sensordata(sensor_id, sensor_type, begin, end)
+    elif mode == 'consolidated':
+        if begin is None or end is None:
+            abort(Response('begin and end have to be set for mode==consolidated', 400))
+        result = select_sensordata_grouped(sensor_id, sensor_type, begin, end)
+    else:
+        abort(Response('unknown value for mode', 400))
+
+    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')
+
+    if mode == 'full':
+        result = select_openweatherdata(cityid, begin, end)
+    elif mode == 'consolidated':
+        if begin is None or end is None:
+            abort(Response('begin and end have to be set for mode==consolidated', 400))
+        result = select_openweatherdata_grouped(cityid, begin, end)
+    else:
+        abort(Response('unknown value for mode', 400))
+
+    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('/api/<version>/currentairtemperature')
+def currentair(version):
+    value, timestamp = currentairtemperature(cityid)
+    return jsonify({"value": value, "timestamp": timestamp})
+
+
+@app.route('/api/<version>/currentwatertemperature')
+def currentwater(version):
+    value, timestamp = currentwatertemperature(mainsensor)
+    return jsonify({"value": value, "timestamp": timestamp})
+
+
+@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
new file mode 100644 (file)
index 0000000..7f7cda8
--- /dev/null
@@ -0,0 +1,234 @@
+/*-- Chart --*/
+.c3 svg {
+  font: 10px sans-serif;
+  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
+}
+
+.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: 0.1;
+}
+
+/*-- Brush --*/
+.c3-brush .extent {
+  fill-opacity: 0.1;
+}
+
+/*-- 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;
+}
+
+/*-- Zoom --*/
+.c3-drag-zoom.enabled {
+  pointer-events: all !important;
+  visibility: visible;
+}
+
+.c3-drag-zoom.disabled {
+  pointer-events: none !important;
+  visibility: hidden;
+}
+
+.c3-drag-zoom .extent {
+  fill-opacity: 0.1;
+}
diff --git a/web/static/c3.js b/web/static/c3.js
new file mode 100644 (file)
index 0000000..04eb151
--- /dev/null
@@ -0,0 +1,9590 @@
+/* @license C3.js v0.6.7 | (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';
+
+    function ChartInternal(api) {
+        var $$ = this;
+        $$.d3 = window.d3 ? window.d3 : typeof require !== 'undefined' ? require("d3") : undefined;
+        $$.api = api;
+        $$.config = $$.getDefaultConfig();
+        $$.data = {};
+        $$.cache = {};
+        $$.axes = {};
+    }
+
+    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);
+                }
+            });
+        })(Chart.prototype, this, this);
+    }
+
+    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();
+    }
+
+    AxisInternal.prototype.axisX = function (selection, x, tickOffset) {
+        selection.attr("transform", function (d) {
+            return "translate(" + Math.ceil(x(d) + tickOffset) + ", 0)";
+        });
+    };
+    AxisInternal.prototype.axisY = function (selection, y) {
+        selection.attr("transform", function (d) {
+            return "translate(0," + Math.ceil(y(d)) + ")";
+        });
+    };
+    AxisInternal.prototype.scaleExtent = function (domain) {
+        var start = domain[0],
+            stop = domain[domain.length - 1];
+        return start < stop ? [start, stop] : [stop, start];
+    };
+    AxisInternal.prototype.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;
+    };
+    AxisInternal.prototype.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;
+    };
+    AxisInternal.prototype.textFormatted = function (v) {
+        var internal = this,
+            formatted = internal.tickFormat ? internal.tickFormat(v) : v;
+        return typeof formatted !== 'undefined' ? formatted : '';
+    };
+    AxisInternal.prototype.updateRange = function () {
+        var internal = this;
+        internal.range = internal.scale.rangeExtent ? internal.scale.rangeExtent() : internal.scaleExtent(internal.scale.range());
+        return internal.range;
+    };
+    AxisInternal.prototype.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;
+    };
+    AxisInternal.prototype.isVertical = function () {
+        return this.orient === 'left' || this.orient === 'right';
+    };
+    AxisInternal.prototype.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 };
+        });
+    };
+    AxisInternal.prototype.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 + "");
+    };
+    AxisInternal.prototype.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;
+    };
+    AxisInternal.prototype.updateTickLength = function () {
+        var internal = this;
+        internal.tickLength = Math.max(internal.innerTickSize, 0) + internal.tickPadding;
+    };
+    AxisInternal.prototype.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;
+    };
+    AxisInternal.prototype.textY = function () {
+        var internal = this,
+            rotate = internal.tickTextRotate;
+        return rotate ? 11.5 - 2.5 * (rotate / 15) * (rotate > 0 ? 1 : -1) : internal.tickLength;
+    };
+    AxisInternal.prototype.textTransform = function () {
+        var internal = this,
+            rotate = internal.tickTextRotate;
+        return rotate ? "rotate(" + rotate + ")" : "";
+    };
+    AxisInternal.prototype.textTextAnchor = function () {
+        var internal = this,
+            rotate = internal.tickTextRotate;
+        return rotate ? rotate > 0 ? "start" : "end" : "middle";
+    };
+    AxisInternal.prototype.tspanDx = function () {
+        var internal = this,
+            rotate = internal.tickTextRotate;
+        return rotate ? 8 * Math.sin(Math.PI * (rotate / 180)) : 0;
+    };
+    AxisInternal.prototype.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;
+    };
+
+    AxisInternal.prototype.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 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',
+        dragZoom: 'c3-drag-zoom',
+        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 asHalfPixel = function asHalfPixel(n) {
+        return Math.ceil(n) + 0.5;
+    };
+    var ceil10 = function ceil10(v) {
+        return Math.ceil(v / 10) * 10;
+    };
+    var diffDomain = function diffDomain(d) {
+        return d[1] - d[0];
+    };
+    var getOption = function getOption(options, key, defaultValue) {
+        return isDefined(options[key]) ? options[key] : defaultValue;
+    };
+    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 hasValue = function hasValue(dict, value) {
+        var found = false;
+        Object.keys(dict).forEach(function (key) {
+            if (dict[key] === value) {
+                found = true;
+            }
+        });
+        return found;
+    };
+    var isArray = function isArray(o) {
+        return Array.isArray(o);
+    };
+    var isDefined = function isDefined(v) {
+        return typeof v !== 'undefined';
+    };
+    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 isFunction = function isFunction(o) {
+        return typeof o === 'function';
+    };
+    var isString = function isString(o) {
+        return typeof o === 'string';
+    };
+    var isUndefined = function isUndefined(v) {
+        return typeof v === 'undefined';
+    };
+    var isValue = function isValue(v) {
+        return v || v === 0;
+    };
+    var notEmpty = function notEmpty(o) {
+        return !isEmpty(o);
+    };
+    var sanitise = function sanitise(str) {
+        return typeof str === 'string' ? str.replace(/</g, '&lt;').replace(/>/g, '&gt;') : str;
+    };
+
+    var Axis = function Axis(owner) {
+        classCallCheck(this, Axis);
+
+        this.owner = owner;
+        this.d3 = owner.d3;
+        this.internal = AxisInternal;
+    };
+
+    Axis.prototype.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');
+        $$.axes.y2.append("text").attr("class", CLASS.axisY2Label).attr("transform", config.axis_rotated ? "" : "rotate(-90)").style("text-anchor", this.textAnchorForY2AxisLabel.bind(this));
+    };
+    Axis.prototype.getXAxis = function getXAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition, withoutRotateTickText) {
+        var $$ = 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 ($$.isCategorized()) {
+            axis.tickCentered(config.axis_x_tick_centered);
+            if (isEmpty(config.axis_x_tick_culling)) {
+                config.axis_x_tick_culling = false;
+            }
+        }
+
+        return axis;
+    };
+    Axis.prototype.updateXAxisTickValues = function updateXAxisTickValues(targets, axis) {
+        var $$ = 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);
+            $$.subXAxis.tickValues(tickValues);
+        }
+        return tickValues;
+    };
+    Axis.prototype.getYAxis = function getYAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition, withoutRotateTickText) {
+        var $$ = 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;
+    };
+    Axis.prototype.getId = function getId(id) {
+        var config = this.owner.config;
+        return id in config.data_axes ? config.data_axes[id] : 'y';
+    };
+    Axis.prototype.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($$, v);
+        } : format;
+    };
+    Axis.prototype.getTickValues = function getTickValues(tickValues, axis) {
+        return tickValues ? tickValues : axis ? axis.tickValues() : undefined;
+    };
+    Axis.prototype.getXAxisTickValues = function getXAxisTickValues() {
+        return this.getTickValues(this.owner.config.axis_x_tick_values, this.owner.xAxis);
+    };
+    Axis.prototype.getYAxisTickValues = function getYAxisTickValues() {
+        return this.getTickValues(this.owner.config.axis_y_tick_values, this.owner.yAxis);
+    };
+    Axis.prototype.getY2AxisTickValues = function getY2AxisTickValues() {
+        return this.getTickValues(this.owner.config.axis_y2_tick_values, this.owner.y2Axis);
+    };
+    Axis.prototype.getLabelOptionByAxisId = function getLabelOptionByAxisId(axisId) {
+        var $$ = this.owner,
+            config = $$.config,
+            option;
+        if (axisId === 'y') {
+            option = config.axis_y_label;
+        } else if (axisId === 'y2') {
+            option = config.axis_y2_label;
+        } else if (axisId === 'x') {
+            option = config.axis_x_label;
+        }
+        return option;
+    };
+    Axis.prototype.getLabelText = function getLabelText(axisId) {
+        var option = this.getLabelOptionByAxisId(axisId);
+        return isString(option) ? option : option ? option.text : null;
+    };
+    Axis.prototype.setLabelText = function setLabelText(axisId, text) {
+        var $$ = 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;
+        }
+    };
+    Axis.prototype.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
+        };
+    };
+    Axis.prototype.getXAxisLabelPosition = function getXAxisLabelPosition() {
+        return this.getLabelPosition('x', this.owner.config.axis_rotated ? 'inner-top' : 'inner-right');
+    };
+    Axis.prototype.getYAxisLabelPosition = function getYAxisLabelPosition() {
+        return this.getLabelPosition('y', this.owner.config.axis_rotated ? 'inner-right' : 'inner-top');
+    };
+    Axis.prototype.getY2AxisLabelPosition = function getY2AxisLabelPosition() {
+        return this.getLabelPosition('y2', this.owner.config.axis_rotated ? 'inner-right' : 'inner-top');
+    };
+    Axis.prototype.getLabelPositionById = function getLabelPositionById(id) {
+        return id === 'y2' ? this.getY2AxisLabelPosition() : id === 'y' ? this.getYAxisLabelPosition() : this.getXAxisLabelPosition();
+    };
+    Axis.prototype.textForXAxisLabel = function textForXAxisLabel() {
+        return this.getLabelText('x');
+    };
+    Axis.prototype.textForYAxisLabel = function textForYAxisLabel() {
+        return this.getLabelText('y');
+    };
+    Axis.prototype.textForY2AxisLabel = function textForY2AxisLabel() {
+        return this.getLabelText('y2');
+    };
+    Axis.prototype.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;
+        }
+    };
+    Axis.prototype.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";
+        }
+    };
+    Axis.prototype.textAnchorForAxisLabel = function textAnchorForAxisLabel(forHorizontal, position) {
+        if (forHorizontal) {
+            return position.isLeft ? 'start' : position.isCenter ? 'middle' : 'end';
+        } else {
+            return position.isBottom ? 'start' : position.isMiddle ? 'middle' : 'end';
+        }
+    };
+    Axis.prototype.xForXAxisLabel = function xForXAxisLabel() {
+        return this.xForAxisLabel(!this.owner.config.axis_rotated, this.getXAxisLabelPosition());
+    };
+    Axis.prototype.xForYAxisLabel = function xForYAxisLabel() {
+        return this.xForAxisLabel(this.owner.config.axis_rotated, this.getYAxisLabelPosition());
+    };
+    Axis.prototype.xForY2AxisLabel = function xForY2AxisLabel() {
+        return this.xForAxisLabel(this.owner.config.axis_rotated, this.getY2AxisLabelPosition());
+    };
+    Axis.prototype.dxForXAxisLabel = function dxForXAxisLabel() {
+        return this.dxForAxisLabel(!this.owner.config.axis_rotated, this.getXAxisLabelPosition());
+    };
+    Axis.prototype.dxForYAxisLabel = function dxForYAxisLabel() {
+        return this.dxForAxisLabel(this.owner.config.axis_rotated, this.getYAxisLabelPosition());
+    };
+    Axis.prototype.dxForY2AxisLabel = function dxForY2AxisLabel() {
+        return this.dxForAxisLabel(this.owner.config.axis_rotated, this.getY2AxisLabelPosition());
+    };
+    Axis.prototype.dyForXAxisLabel = function dyForXAxisLabel() {
+        var $$ = this.owner,
+            config = $$.config,
+            position = this.getXAxisLabelPosition();
+        if (config.axis_rotated) {
+            return position.isInner ? "1.2em" : -25 - ($$.config.axis_x_inner ? 0 : this.getMaxTickWidth('x'));
+        } else {
+            return position.isInner ? "-0.5em" : config.axis_x_height ? config.axis_x_height - 10 : "3em";
+        }
+    };
+    Axis.prototype.dyForYAxisLabel = function dyForYAxisLabel() {
+        var $$ = 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);
+        }
+    };
+    Axis.prototype.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 + ($$.config.axis_y2_inner ? 0 : this.getMaxTickWidth('y2') + 15);
+        }
+    };
+    Axis.prototype.textAnchorForXAxisLabel = function textAnchorForXAxisLabel() {
+        var $$ = this.owner;
+        return this.textAnchorForAxisLabel(!$$.config.axis_rotated, this.getXAxisLabelPosition());
+    };
+    Axis.prototype.textAnchorForYAxisLabel = function textAnchorForYAxisLabel() {
+        var $$ = this.owner;
+        return this.textAnchorForAxisLabel($$.config.axis_rotated, this.getYAxisLabelPosition());
+    };
+    Axis.prototype.textAnchorForY2AxisLabel = function textAnchorForY2AxisLabel() {
+        var $$ = this.owner;
+        return this.textAnchorForAxisLabel($$.config.axis_rotated, this.getY2AxisLabelPosition());
+    };
+    Axis.prototype.getMaxTickWidth = function getMaxTickWidth(id, withoutRecompute) {
+        var $$ = 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];
+    };
+
+    Axis.prototype.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));
+    };
+    Axis.prototype.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);
+    };
+    Axis.prototype.convertPixelsToAxisPadding = function convertPixelsToAxisPadding(pixels, domainLength) {
+        var $$ = this.owner,
+            length = $$.config.axis_rotated ? $$.width : $$.height;
+        return domainLength * (pixels / length);
+    };
+    Axis.prototype.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;
+    };
+    Axis.prototype.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
+        };
+    };
+    Axis.prototype.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: "0.6.7",
+        chart: {
+            fn: Chart.prototype,
+            internal: {
+                fn: ChartInternal.prototype,
+                axis: {
+                    fn: Axis.prototype,
+                    internal: {
+                        fn: AxisInternal.prototype
+                    }
+                }
+            }
+        },
+        generate: function generate(config) {
+            return new Chart(config);
+        }
+    };
+
+    ChartInternal.prototype.beforeInit = function () {
+        // can do something
+    };
+    ChartInternal.prototype.afterInit = function () {
+        // can do something
+    };
+    ChartInternal.prototype.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($$.convertColumnsToData(config.data_columns));
+        } else {
+            throw Error('url or json or rows or columns is required.');
+        }
+    };
+
+    ChartInternal.prototype.initParams = function () {
+        var $$ = 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
+    };
+
+    ChartInternal.prototype.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();
+        }
+    };
+
+    ChartInternal.prototype.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 ($$.initDragZoom) {
+            $$.initDragZoom();
+        }
+        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();
+        }
+
+        // Cover whole with rects for events
+        $$.initEventRect();
+
+        // Define g for chart
+        $$.initChartElements();
+
+        // Add Axis
+        $$.axis.init();
+
+        // Set targets
+        $$.updateTargets($$.data.targets);
+
+        // Set default extent if defined
+        if (config.axis_x_selection) {
+            $$.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();
+    };
+
+    ChartInternal.prototype.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)
+                });
+            });
+        }
+    };
+
+    ChartInternal.prototype.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 + $$.radiusExpanded * 1.1;
+        }
+    };
+
+    ChartInternal.prototype.updateTargets = function (targets) {
+        var $$ = 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
+        $$.showTargets();
+    };
+    ChartInternal.prototype.showTargets = function () {
+        var $$ = this;
+        $$.svg.selectAll('.' + CLASS.target).filter(function (d) {
+            return $$.isTargetToShow(d.id);
+        }).transition().duration($$.config.transition_duration).style("opacity", 1);
+    };
+
+    ChartInternal.prototype.redraw = function (options, transitions) {
+        var $$ = 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;
+        });
+    };
+
+    ChartInternal.prototype.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);
+    };
+    ChartInternal.prototype.redrawWithoutRescale = function () {
+        this.redraw({
+            withY: false,
+            withSubchart: false,
+            withEventRect: false,
+            withTransitionForAxis: false
+        });
+    };
+
+    ChartInternal.prototype.isTimeSeries = function () {
+        return this.config.axis_x_type === 'timeseries';
+    };
+    ChartInternal.prototype.isCategorized = function () {
+        return this.config.axis_x_type.indexOf('categor') >= 0;
+    };
+    ChartInternal.prototype.isCustomX = function () {
+        var $$ = this,
+            config = $$.config;
+        return !$$.isTimeSeries() && (config.data_x || notEmpty(config.data_xs));
+    };
+
+    ChartInternal.prototype.isTimeSeriesY = function () {
+        return this.config.axis_y_type === 'timeseries';
+    };
+
+    ChartInternal.prototype.getTranslate = function (target) {
+        var $$ = 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 + ")";
+    };
+    ChartInternal.prototype.initialOpacity = function (d) {
+        return d.value !== null && this.withoutFadeIn[d.id] ? 1 : 0;
+    };
+    ChartInternal.prototype.initialOpacityForCircle = function (d) {
+        return d.value !== null && this.withoutFadeIn[d.id] ? this.opacityForCircle(d) : 0;
+    };
+    ChartInternal.prototype.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;
+    };
+    ChartInternal.prototype.opacityForText = function () {
+        return this.hasDataLabel() ? 1 : 0;
+    };
+    ChartInternal.prototype.xx = function (d) {
+        return d ? this.x(d.x) : null;
+    };
+    ChartInternal.prototype.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));
+    };
+    ChartInternal.prototype.yv = function (d) {
+        var $$ = this,
+            yScale = d.axis && d.axis === 'y2' ? $$.y2 : $$.y;
+        return Math.ceil(yScale(d.value));
+    };
+    ChartInternal.prototype.subxx = function (d) {
+        return d ? this.subX(d.x) : null;
+    };
+
+    ChartInternal.prototype.transformMain = function (withTransition, transitions) {
+        var $$ = 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", $$.getTranslate('arc'));
+    };
+    ChartInternal.prototype.transformAll = function (withTransition, transitions) {
+        var $$ = this;
+        $$.transformMain(withTransition, transitions);
+        if ($$.config.subchart_show) {
+            $$.transformContext(withTransition, transitions);
+        }
+        if ($$.legend) {
+            $$.transformLegend(withTransition);
+        }
+    };
+
+    ChartInternal.prototype.updateSvgSize = function () {
+        var $$ = 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");
+    };
+
+    ChartInternal.prototype.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);
+    };
+
+    ChartInternal.prototype.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();
+                            }
+                            $$.config.oninit.call($$);
+                            $$.redraw({
+                                withTransform: true,
+                                withUpdateXDomain: true,
+                                withUpdateOrgXDomain: true,
+                                withTransition: false,
+                                withTransitionForTransform: false,
+                                withLegend: true
+                            });
+                            selection.transition().style('opacity', 1);
+                        }
+                    }, 10);
+                }
+            });
+        });
+        observer.observe(selection.node(), {
+            attributes: true,
+            childList: true,
+            characterData: true
+        });
+    };
+
+    ChartInternal.prototype.bindResize = function () {
+        var $$ = 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();
+            };
+        }
+    };
+
+    ChartInternal.prototype.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;
+    };
+
+    ChartInternal.prototype.endall = function (transition, callback) {
+        var n = 0;
+        transition.each(function () {
+            ++n;
+        }).on("end", function () {
+            if (! --n) {
+                callback.apply(this, arguments);
+            }
+        });
+    };
+    ChartInternal.prototype.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;
+    };
+
+    ChartInternal.prototype.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;
+    };
+
+    ChartInternal.prototype.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;
+    };
+
+    ChartInternal.prototype.getPathBox = getPathBox;
+    ChartInternal.prototype.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 */
+
+    Chart.prototype.axis = function () {};
+    Chart.prototype.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?
+    };
+    Chart.prototype.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;
+            }
+            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
+        } else {
+            return {
+                x: config.axis_x_max,
+                y: config.axis_y_max,
+                y2: config.axis_y2_max
+            };
+        }
+    };
+    Chart.prototype.axis.min = function (min) {
+        var $$ = 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
+            };
+        }
+    };
+    Chart.prototype.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()
+            };
+        }
+    };
+
+    Chart.prototype.category = function (i, category) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (arguments.length > 1) {
+            config.axis_x_categories[i] = category;
+            $$.redraw();
+        }
+        return config.axis_x_categories[i];
+    };
+    Chart.prototype.categories = function (categories) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (!arguments.length) {
+            return config.axis_x_categories;
+        }
+        config.axis_x_categories = categories;
+        $$.redraw();
+        return config.axis_x_categories;
+    };
+
+    Chart.prototype.resize = function (size) {
+        var $$ = this.internal,
+            config = $$.config;
+        config.size_width = size ? size.width : null;
+        config.size_height = size ? size.height : null;
+        this.flush();
+    };
+
+    Chart.prototype.flush = function () {
+        var $$ = this.internal;
+        $$.updateAndRedraw({ withLegend: true, withTransition: false, withTransitionForTransform: false });
+    };
+
+    Chart.prototype.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) {
+            $$[key] = null;
+        });
+
+        return null;
+    };
+
+    // TODO: fix
+    Chart.prototype.color = function (id) {
+        var $$ = this.internal;
+        return $$.color(id); // more patterns
+    };
+
+    Chart.prototype.data = function (targetIds) {
+        var targets = this.internal.data.targets;
+        return typeof targetIds === 'undefined' ? targets : targets.filter(function (t) {
+            return [].concat(targetIds).indexOf(t.id) >= 0;
+        });
+    };
+    Chart.prototype.data.shown = function (targetIds) {
+        return this.internal.filterTargetsToShow(this.data(targetIds));
+    };
+    Chart.prototype.data.values = function (targetId) {
+        var targets,
+            values = null;
+        if (targetId) {
+            targets = this.data(targetId);
+            values = targets[0] ? targets[0].values.map(function (d) {
+                return d.value;
+            }) : null;
+        }
+        return values;
+    };
+    Chart.prototype.data.names = function (names) {
+        this.internal.clearLegendItemTextBoxCache();
+        return this.internal.updateDataAttributes('names', names);
+    };
+    Chart.prototype.data.colors = function (colors) {
+        return this.internal.updateDataAttributes('colors', colors);
+    };
+    Chart.prototype.data.axes = function (axes) {
+        return this.internal.updateDataAttributes('axes', axes);
+    };
+
+    Chart.prototype.flow = function (args) {
+        var $$ = 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 : $$.config.transition_duration,
+                done: args.done,
+                orgDataCount: orgDataCount
+            },
+            withLegend: true,
+            withTransition: orgDataCount > 1,
+            withTrimXDomain: false,
+            withUpdateXAxis: true
+        });
+    };
+
+    ChartInternal.prototype.generateFlow = function (args) {
+        var $$ = 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();
+
+                $$.flowing = false;
+            });
+        };
+    };
+
+    Chart.prototype.focus = function (targetIds) {
+        var $$ = 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 = $$.defocusedTargetIds.filter(function (id) {
+            return targetIds.indexOf(id) < 0;
+        });
+    };
+
+    Chart.prototype.defocus = function (targetIds) {
+        var $$ = 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;
+        });
+        $$.defocusedTargetIds = targetIds;
+    };
+
+    Chart.prototype.revert = function (targetIds) {
+        var $$ = 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 = [];
+    };
+
+    Chart.prototype.xgrids = function (grids) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (!grids) {
+            return config.grid_x_lines;
+        }
+        config.grid_x_lines = grids;
+        $$.redrawWithoutRescale();
+        return config.grid_x_lines;
+    };
+    Chart.prototype.xgrids.add = function (grids) {
+        var $$ = this.internal;
+        return this.xgrids($$.config.grid_x_lines.concat(grids ? grids : []));
+    };
+    Chart.prototype.xgrids.remove = function (params) {
+        // TODO: multiple
+        var $$ = this.internal;
+        $$.removeGridLines(params, true);
+    };
+
+    Chart.prototype.ygrids = function (grids) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (!grids) {
+            return config.grid_y_lines;
+        }
+        config.grid_y_lines = grids;
+        $$.redrawWithoutRescale();
+        return config.grid_y_lines;
+    };
+    Chart.prototype.ygrids.add = function (grids) {
+        var $$ = this.internal;
+        return this.ygrids($$.config.grid_y_lines.concat(grids ? grids : []));
+    };
+    Chart.prototype.ygrids.remove = function (params) {
+        // TODO: multiple
+        var $$ = this.internal;
+        $$.removeGridLines(params, false);
+    };
+
+    Chart.prototype.groups = function (groups) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (isUndefined(groups)) {
+            return config.data_groups;
+        }
+        config.data_groups = groups;
+        $$.redraw();
+        return config.data_groups;
+    };
+
+    Chart.prototype.legend = function () {};
+    Chart.prototype.legend.show = function (targetIds) {
+        var $$ = this.internal;
+        $$.showLegend($$.mapToTargetIds(targetIds));
+        $$.updateAndRedraw({ withLegend: true });
+    };
+    Chart.prototype.legend.hide = function (targetIds) {
+        var $$ = this.internal;
+        $$.hideLegend($$.mapToTargetIds(targetIds));
+        $$.updateAndRedraw({ withLegend: false });
+    };
+
+    Chart.prototype.load = function (args) {
+        var $$ = this.internal,
+            config = $$.config;
+        // update xs if specified
+        if (args.xs) {
+            $$.addXs(args.xs);
+        }
+        // update names if exists
+        if ('names' in args) {
+            Chart.prototype.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);
+        }
+    };
+
+    Chart.prototype.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();
+            }
+        });
+    };
+
+    Chart.prototype.regions = function (regions) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (!regions) {
+            return config.regions;
+        }
+        config.regions = regions;
+        $$.redrawWithoutRescale();
+        return config.regions;
+    };
+    Chart.prototype.regions.add = function (regions) {
+        var $$ = this.internal,
+            config = $$.config;
+        if (!regions) {
+            return config.regions;
+        }
+        config.regions = config.regions.concat(regions);
+        $$.redrawWithoutRescale();
+        return config.regions;
+    };
+    Chart.prototype.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 = $$.main.select('.' + CLASS.regions).selectAll(classes.map(function (c) {
+            return '.' + c;
+        }));
+        (duration ? regions.transition().duration(duration) : regions).style('opacity', 0).remove();
+
+        config.regions = config.regions.filter(function (region) {
+            var found = false;
+            if (!region['class']) {
+                return true;
+            }
+            region['class'].split(' ').forEach(function (c) {
+                if (classes.indexOf(c) >= 0) {
+                    found = true;
+                }
+            });
+            return !found;
+        });
+
+        return config.regions;
+    };
+
+    Chart.prototype.selected = function (targetId) {
+        var $$ = this.internal,
+            d3 = $$.d3;
+        return d3.merge($$.main.selectAll('.' + CLASS.shapes + $$.getTargetSelectorSuffix(targetId)).selectAll('.' + CLASS.shape).filter(function () {
+            return d3.select(this).classed(CLASS.SELECTED);
+        }).map(function (d) {
+            return d.map(function (d) {
+                var data = d.__data__;return data.data ? data.data : data;
+            });
+        }));
+    };
+    Chart.prototype.select = function (ids, indices, resetOther) {
+        var $$ = 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($$),
+                isTargetId = config.data_selection_grouped || !ids || ids.indexOf(id) >= 0,
+                isTargetIndex = !indices || indices.indexOf(i) >= 0,
+                isSelected = shape.classed(CLASS.SELECTED);
+            // line/area selection not supported yet
+            if (shape.classed(CLASS.line) || shape.classed(CLASS.area)) {
+                return;
+            }
+            if (isTargetId && isTargetIndex) {
+                if (config.data_selection_isselectable(d) && !isSelected) {
+                    toggle(true, shape.classed(CLASS.SELECTED, true), d, i);
+                }
+            } else if (isDefined(resetOther) && resetOther) {
+                if (isSelected) {
+                    toggle(false, shape.classed(CLASS.SELECTED, false), d, i);
+                }
+            }
+        });
+    };
+    Chart.prototype.unselect = function (ids, indices) {
+        var $$ = 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($$),
+                isTargetId = config.data_selection_grouped || !ids || ids.indexOf(id) >= 0,
+                isTargetIndex = !indices || indices.indexOf(i) >= 0,
+                isSelected = shape.classed(CLASS.SELECTED);
+            // line/area selection not supported yet
+            if (shape.classed(CLASS.line) || shape.classed(CLASS.area)) {
+                return;
+            }
+            if (isTargetId && isTargetIndex) {
+                if (config.data_selection_isselectable(d)) {
+                    if (isSelected) {
+                        toggle(false, shape.classed(CLASS.SELECTED, false), d, i);
+                    }
+                }
+            }
+        });
+    };
+
+    Chart.prototype.show = function (targetIds, options) {
+        var $$ = 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);
+        }
+
+        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
+    };
+
+    Chart.prototype.hide = function (targetIds, options) {
+        var $$ = 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);
+        }
+
+        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
+    };
+
+    Chart.prototype.toggle = function (targetIds, options) {
+        var that = this,
+            $$ = this.internal;
+        $$.mapToTargetIds(targetIds).forEach(function (targetId) {
+            $$.isTargetToShow(targetId) ? that.hide(targetId, options) : that.show(targetId, options);
+        });
+    };
+
+    Chart.prototype.tooltip = function () {};
+    Chart.prototype.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);
+    };
+    Chart.prototype.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);
+    };
+
+    Chart.prototype.transform = function (type, targetIds) {
+        var $$ = this.internal,
+            options = ['pie', 'donut'].indexOf(type) >= 0 ? { withTransform: true } : null;
+        $$.transformTo(targetIds, type, options);
+    };
+
+    ChartInternal.prototype.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
+        $$.updateAndRedraw(options);
+    };
+
+    Chart.prototype.x = function (x) {
+        var $$ = this.internal;
+        if (arguments.length) {
+            $$.updateTargetX($$.data.targets, x);
+            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
+        }
+        return $$.data.xs;
+    };
+    Chart.prototype.xs = function (xs) {
+        var $$ = this.internal;
+        if (arguments.length) {
+            $$.updateTargetXs($$.data.targets, xs);
+            $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true });
+        }
+        return $$.data.xs;
+    };
+
+    Chart.prototype.zoom = function (domain) {
+        var $$ = 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();
+        }
+    };
+    Chart.prototype.zoom.enable = function (enabled) {
+        var $$ = this.internal;
+        $$.config.zoom_enabled = enabled;
+        $$.updateAndRedraw();
+    };
+    Chart.prototype.unzoom = function () {
+        var $$ = this.internal;
+        if ($$.config.subchart_show) {
+            $$.brush.clear();
+        } else {
+            $$.updateXDomain(null, true, false, false, $$.subX.domain());
+            $$.redraw({ withY: $$.config.zoom_rescale, withSubchart: false });
+        }
+    };
+
+    Chart.prototype.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;
+        }
+    };
+
+    Chart.prototype.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;
+        }
+    };
+
+    Chart.prototype.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()
+            };
+        }
+    };
+
+    ChartInternal.prototype.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;
+            };
+        }
+
+        $$.pie.sort(orderFct || null);
+    };
+
+    ChartInternal.prototype.updateRadius = function () {
+        var $$ = 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 : $$.radius;
+    };
+
+    ChartInternal.prototype.updateArc = function () {
+        var $$ = this;
+        $$.svgArc = $$.getSvgArc();
+        $$.svgArcExpanded = $$.getSvgArcExpanded();
+        $$.svgArcExpandedSub = $$.getSvgArcExpanded(0.98);
+    };
+
+    ChartInternal.prototype.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;
+    };
+
+    ChartInternal.prototype.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 = $$.updateAngle(d);
+            return updated ? arc(updated) : "M 0 0";
+        };
+        // TODO: extends all function
+        newArc.centroid = arc.centroid;
+        return newArc;
+    };
+
+    ChartInternal.prototype.getSvgArcExpanded = function (rate) {
+        rate = rate || 1;
+        var $$ = 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";
+        };
+    };
+
+    ChartInternal.prototype.getArc = function (d, withoutUpdate, force) {
+        return force || this.isArcType(d.data) ? this.svgArc(d, withoutUpdate) : "M 0 0";
+    };
+
+    ChartInternal.prototype.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;
+    };
+
+    ChartInternal.prototype.getArcRatio = function (d) {
+        var $$ = this,
+            config = $$.config,
+            whole = Math.PI * ($$.hasType('gauge') && !config.gauge_fullCircle ? 1 : 2);
+        return d ? (d.endAngle - d.startAngle) / whole : null;
+    };
+
+    ChartInternal.prototype.convertToArcData = function (d) {
+        return this.addName({
+            id: d.data.id,
+            value: d.value,
+            ratio: this.getArcRatio(d),
+            index: d.index
+        });
+    };
+
+    ChartInternal.prototype.textForArcLabel = function (d) {
+        var $$ = 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) : $$.defaultArcValueFormat(value, ratio);
+    };
+
+    ChartInternal.prototype.textForGaugeMinMax = function (value, isMax) {
+        var $$ = this,
+            format = $$.getGaugeLabelExtents();
+
+        return format ? format(value, isMax) : value;
+    };
+
+    ChartInternal.prototype.expandArc = function (targetIds) {
+        var $$ = 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)) ;
+            });
+        });
+    };
+
+    ChartInternal.prototype.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);
+    };
+
+    ChartInternal.prototype.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 ($$.isPieType(id)) {
+            return config.pie_expand_duration;
+        } else {
+            return 50;
+        }
+    };
+
+    ChartInternal.prototype.shouldExpand = function (id) {
+        var $$ = this,
+            config = $$.config;
+        return $$.isDonutType(id) && config.donut_expand || $$.isGaugeType(id) && config.gauge_expand || $$.isPieType(id) && config.pie_expand;
+    };
+
+    ChartInternal.prototype.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;
+    };
+
+    ChartInternal.prototype.meetsArcLabelThreshold = function (ratio) {
+        var $$ = this,
+            config = $$.config,
+            threshold = $$.hasType('donut') ? config.donut_label_threshold : config.pie_label_threshold;
+        return ratio >= threshold;
+    };
+
+    ChartInternal.prototype.getArcLabelFormat = function () {
+        var $$ = this,
+            config = $$.config,
+            format = config.pie_label_format;
+        if ($$.hasType('gauge')) {
+            format = config.gauge_label_format;
+        } else if ($$.hasType('donut')) {
+            format = config.donut_label_format;
+        }
+        return format;
+    };
+
+    ChartInternal.prototype.getGaugeLabelExtents = function () {
+        var $$ = this,
+            config = $$.config;
+        return config.gauge_label_extents;
+    };
+
+    ChartInternal.prototype.getArcTitle = function () {
+        var $$ = this;
+        return $$.hasType('donut') ? $$.config.donut_title : "";
+    };
+
+    ChartInternal.prototype.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();
+    };
+
+    ChartInternal.prototype.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());
+    };
+
+    ChartInternal.prototype.redrawArc = function (duration, durationForExit, withTransform) {
+        var $$ = this,
+            d3 = $$.d3,
+            config = $$.config,
+            main = $$.main,
+            arcs,
+            mainArc,
+            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;
+            var backgroundArc = $$.arcs.select('g.' + CLASS.chartArcsBackground).selectAll('path.' + CLASS.chartArcsBackground).data($$.data.targets);
+
+            backgroundArc.enter().append("path").attr("class", function (d, i) {
+                return CLASS.chartArcsBackground + ' ' + CLASS.chartArcsBackground + '-' + i;
+            }).merge(backgroundArc).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) : '');
+        }
+    };
+    ChartInternal.prototype.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");
+        }
+    };
+    ChartInternal.prototype.getGaugeLabelHeight = function () {
+        return this.config.gauge_label_show ? 20 : 0;
+    };
+
+    ChartInternal.prototype.hasCaches = function (ids) {
+        for (var i = 0; i < ids.length; i++) {
+            if (!(ids[i] in this.cache)) {
+                return false;
+            }
+        }
+        return true;
+    };
+    ChartInternal.prototype.addCache = function (id, target) {
+        this.cache[id] = this.cloneTarget(target);
+    };
+    ChartInternal.prototype.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;
+    };
+
+    ChartInternal.prototype.categoryName = function (i) {
+        var config = this.config;
+        return i < config.axis_x_categories.length ? config.axis_x_categories[i] : i;
+    };
+
+    ChartInternal.prototype.generateTargetClass = function (targetId) {
+        return targetId || targetId === 0 ? ('-' + targetId).replace(/\s/g, '-') : '';
+    };
+    ChartInternal.prototype.generateClass = function (prefix, targetId) {
+        return " " + prefix + " " + prefix + this.generateTargetClass(targetId);
+    };
+    ChartInternal.prototype.classText = function (d) {
+        return this.generateClass(CLASS.text, d.index);
+    };
+    ChartInternal.prototype.classTexts = function (d) {
+        return this.generateClass(CLASS.texts, d.id);
+    };
+    ChartInternal.prototype.classShape = function (d) {
+        return this.generateClass(CLASS.shape, d.index);
+    };
+    ChartInternal.prototype.classShapes = function (d) {
+        return this.generateClass(CLASS.shapes, d.id);
+    };
+    ChartInternal.prototype.classLine = function (d) {
+        return this.classShape(d) + this.generateClass(CLASS.line, d.id);
+    };
+    ChartInternal.prototype.classLines = function (d) {
+        return this.classShapes(d) + this.generateClass(CLASS.lines, d.id);
+    };
+    ChartInternal.prototype.classCircle = function (d) {
+        return this.classShape(d) + this.generateClass(CLASS.circle, d.index);
+    };
+    ChartInternal.prototype.classCircles = function (d) {
+        return this.classShapes(d) + this.generateClass(CLASS.circles, d.id);
+    };
+    ChartInternal.prototype.classBar = function (d) {
+        return this.classShape(d) + this.generateClass(CLASS.bar, d.index);
+    };
+    ChartInternal.prototype.classBars = function (d) {
+        return this.classShapes(d) + this.generateClass(CLASS.bars, d.id);
+    };
+    ChartInternal.prototype.classArc = function (d) {
+        return this.classShape(d.data) + this.generateClass(CLASS.arc, d.data.id);
+    };
+    ChartInternal.prototype.classArcs = function (d) {
+        return this.classShapes(d.data) + this.generateClass(CLASS.arcs, d.data.id);
+    };
+    ChartInternal.prototype.classArea = function (d) {
+        return this.classShape(d) + this.generateClass(CLASS.area, d.id);
+    };
+    ChartInternal.prototype.classAreas = function (d) {
+        return this.classShapes(d) + this.generateClass(CLASS.areas, d.id);
+    };
+    ChartInternal.prototype.classRegion = function (d, i) {
+        return this.generateClass(CLASS.region, i) + ' ' + ('class' in d ? d['class'] : '');
+    };
+    ChartInternal.prototype.classEvent = function (d) {
+        return this.generateClass(CLASS.eventRect, d.index);
+    };
+    ChartInternal.prototype.classTarget = function (id) {
+        var $$ = this;
+        var additionalClassSuffix = $$.config.data_classes[id],
+            additionalClass = '';
+        if (additionalClassSuffix) {
+            additionalClass = ' ' + CLASS.target + '-' + additionalClassSuffix;
+        }
+        return $$.generateClass(CLASS.target, id) + additionalClass;
+    };
+    ChartInternal.prototype.classFocus = function (d) {
+        return this.classFocused(d) + this.classDefocused(d);
+    };
+    ChartInternal.prototype.classFocused = function (d) {
+        return ' ' + (this.focusedTargetIds.indexOf(d.id) >= 0 ? CLASS.focused : '');
+    };
+    ChartInternal.prototype.classDefocused = function (d) {
+        return ' ' + (this.defocusedTargetIds.indexOf(d.id) >= 0 ? CLASS.defocused : '');
+    };
+    ChartInternal.prototype.classChartText = function (d) {
+        return CLASS.chartText + this.classTarget(d.id);
+    };
+    ChartInternal.prototype.classChartLine = function (d) {
+        return CLASS.chartLine + this.classTarget(d.id);
+    };
+    ChartInternal.prototype.classChartBar = function (d) {
+        return CLASS.chartBar + this.classTarget(d.id);
+    };
+    ChartInternal.prototype.classChartArc = function (d) {
+        return CLASS.chartArc + this.classTarget(d.data.id);
+    };
+    ChartInternal.prototype.getTargetSelectorSuffix = function (targetId) {
+        return this.generateTargetClass(targetId).replace(/([?!@#$%^&*()_=+,.<>'":;\[\]\/|~`{}\\])/g, '\\$1');
+    };
+    ChartInternal.prototype.selectorTarget = function (id, prefix) {
+        return (prefix || '') + '.' + CLASS.target + this.getTargetSelectorSuffix(id);
+    };
+    ChartInternal.prototype.selectorTargets = function (ids, prefix) {
+        var $$ = this;
+        ids = ids || [];
+        return ids.length ? ids.map(function (id) {
+            return $$.selectorTarget(id, prefix);
+        }) : null;
+    };
+    ChartInternal.prototype.selectorLegend = function (id) {
+        return '.' + CLASS.legendItem + this.getTargetSelectorSuffix(id);
+    };
+    ChartInternal.prototype.selectorLegends = function (ids) {
+        var $$ = this;
+        return ids && ids.length ? ids.map(function (id) {
+            return $$.selectorLegend(id);
+        }) : null;
+    };
+
+    ChartInternal.prototype.getClipPath = function (id) {
+        var isIE9 = window.navigator.appVersion.toLowerCase().indexOf("msie 9.") >= 0;
+        return "url(" + (isIE9 ? "" : document.URL.split('#')[0]) + "#" + id + ")";
+    };
+    ChartInternal.prototype.appendClip = function (parent, id) {
+        return parent.append("clipPath").attr("id", id).append("rect");
+    };
+    ChartInternal.prototype.getAxisClipX = function (forHorizontal) {
+        // axis line width + padding for left
+        var left = Math.max(30, this.margin.left);
+        return forHorizontal ? -(1 + left) : -(left - 1);
+    };
+    ChartInternal.prototype.getAxisClipY = function (forHorizontal) {
+        return forHorizontal ? -20 : -this.margin.top;
+    };
+    ChartInternal.prototype.getXAxisClipX = function () {
+        var $$ = this;
+        return $$.getAxisClipX(!$$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getXAxisClipY = function () {
+        var $$ = this;
+        return $$.getAxisClipY(!$$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getYAxisClipX = function () {
+        var $$ = this;
+        return $$.config.axis_y_inner ? -1 : $$.getAxisClipX($$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getYAxisClipY = function () {
+        var $$ = this;
+        return $$.getAxisClipY($$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getAxisClipWidth = function (forHorizontal) {
+        var $$ = 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;
+    };
+    ChartInternal.prototype.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;
+    };
+    ChartInternal.prototype.getXAxisClipWidth = function () {
+        var $$ = this;
+        return $$.getAxisClipWidth(!$$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getXAxisClipHeight = function () {
+        var $$ = this;
+        return $$.getAxisClipHeight(!$$.config.axis_rotated);
+    };
+    ChartInternal.prototype.getYAxisClipWidth = function () {
+        var $$ = this;
+        return $$.getAxisClipWidth($$.config.axis_rotated) + ($$.config.axis_y_inner ? 20 : 0);
+    };
+    ChartInternal.prototype.getYAxisClipHeight = function () {
+        var $$ = this;
+        return $$.getAxisClipHeight($$.config.axis_rotated);
+    };
+
+    ChartInternal.prototype.generateColor = function () {
+        var $$ = 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;
+        };
+    };
+    ChartInternal.prototype.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;
+    };
+
+    ChartInternal.prototype.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_type: 'scroll',
+            zoom_disableDefaultBehavior: false,
+            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;
+    };
+    ChartInternal.prototype.additionalConfig = {};
+
+    ChartInternal.prototype.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;
+            }
+        });
+    };
+
+    ChartInternal.prototype.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($$, data, keys));
+        }).catch(function (error) {
+            throw error;
+        });
+    };
+    ChartInternal.prototype.convertXsvToData = function (xsv) {
+        var keys = xsv.columns,
+            rows = xsv;
+        if (rows.length === 0) {
+            return { keys: keys, rows: [keys.reduce(function (row, key) {
+                    return Object.assign(row, defineProperty({}, key, null));
+                }, {})] };
+        } else {
+            // [].concat() is to convert result into a plain array otherwise
+            // test is not happy because rows have properties.
+            return { keys: keys, rows: [].concat(xsv) };
+        }
+    };
+    ChartInternal.prototype.convertJsonToData = function (json, keys) {
+        var $$ = 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;
+    };
+    ChartInternal.prototype.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}
+     */
+    ChartInternal.prototype.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}
+     */
+    ChartInternal.prototype.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 $$.data.xs, False to replace.
+     * @return {!Array}
+     */
+    ChartInternal.prototype.convertDataToTargets = function (data, appendXs) {
+        var $$ = 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;
+    };
+
+    ChartInternal.prototype.isX = function (key) {
+        var $$ = this,
+            config = $$.config;
+        return config.data_x && key === config.data_x || notEmpty(config.data_xs) && hasValue(config.data_xs, key);
+    };
+    ChartInternal.prototype.isNotX = function (key) {
+        return !this.isX(key);
+    };
+    ChartInternal.prototype.getXKey = function (id) {
+        var $$ = this,
+            config = $$.config;
+        return config.data_x ? config.data_x : notEmpty(config.data_xs) ? config.data_xs[id] : null;
+    };
+    ChartInternal.prototype.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;
+    };
+    ChartInternal.prototype.getXValue = function (id, i) {
+        var $$ = this;
+        return id in $$.data.xs && $$.data.xs[id] && isValue($$.data.xs[id][i]) ? $$.data.xs[id][i] : i;
+    };
+    ChartInternal.prototype.getOtherTargetXs = function () {
+        var $$ = this,
+            idsForX = Object.keys($$.data.xs);
+        return idsForX.length ? $$.data.xs[idsForX[0]] : null;
+    };
+    ChartInternal.prototype.getOtherTargetX = function (index) {
+        var xs = this.getOtherTargetXs();
+        return xs && index < xs.length ? xs[index] : null;
+    };
+    ChartInternal.prototype.addXs = function (xs) {
+        var $$ = this;
+        Object.keys(xs).forEach(function (id) {
+            $$.config.data_xs[id] = xs[id];
+        });
+    };
+    ChartInternal.prototype.addName = function (data) {
+        var $$ = this,
+            name;
+        if (data) {
+            name = $$.config.data_names[data.id];
+            data.name = name !== undefined ? name : data.id;
+        }
+        return data;
+    };
+    ChartInternal.prototype.getValueOnIndex = function (values, index) {
+        var valueOnIndex = values.filter(function (v) {
+            return v.index === index;
+        });
+        return valueOnIndex.length ? valueOnIndex[0] : null;
+    };
+    ChartInternal.prototype.updateTargetX = function (targets, x) {
+        var $$ = this;
+        targets.forEach(function (t) {
+            t.values.forEach(function (v, i) {
+                v.x = $$.generateTargetX(x[i], t.id, i);
+            });
+            $$.data.xs[t.id] = x;
+        });
+    };
+    ChartInternal.prototype.updateTargetXs = function (targets, xs) {
+        var $$ = this;
+        targets.forEach(function (t) {
+            if (xs[t.id]) {
+                $$.updateTargetX([t], xs[t.id]);
+            }
+        });
+    };
+    ChartInternal.prototype.generateTargetX = function (rawX, id, index) {
+        var $$ = this,
+            x;
+        if ($$.isTimeSeries()) {
+            x = rawX ? $$.parseDate(rawX) : $$.parseDate($$.getXValue(id, index));
+        } else if ($$.isCustomX() && !$$.isCategorized()) {
+            x = isValue(rawX) ? +rawX : $$.getXValue(id, index);
+        } else {
+            x = index;
+        }
+        return x;
+    };
+    ChartInternal.prototype.cloneTarget = function (target) {
+        return {
+            id: target.id,
+            id_org: target.id_org,
+            values: target.values.map(function (d) {
+                return {
+                    x: d.x,
+                    value: d.value,
+                    id: d.id
+                };
+            })
+        };
+    };
+    ChartInternal.prototype.getMaxDataCount = function () {
+        var $$ = this;
+        return $$.d3.max($$.data.targets, function (t) {
+            return t.values.length;
+        });
+    };
+    ChartInternal.prototype.mapToIds = function (targets) {
+        return targets.map(function (d) {
+            return d.id;
+        });
+    };
+    ChartInternal.prototype.mapToTargetIds = function (ids) {
+        var $$ = this;
+        return ids ? [].concat(ids) : $$.mapToIds($$.data.targets);
+    };
+    ChartInternal.prototype.hasTarget = function (targets, id) {
+        var ids = this.mapToIds(targets),
+            i;
+        for (i = 0; i < ids.length; i++) {
+            if (ids[i] === id) {
+                return true;
+            }
+        }
+        return false;
+    };
+    ChartInternal.prototype.isTargetToShow = function (targetId) {
+        return this.hiddenTargetIds.indexOf(targetId) < 0;
+    };
+    ChartInternal.prototype.isLegendToShow = function (targetId) {
+        return this.hiddenLegendIds.indexOf(targetId) < 0;
+    };
+    ChartInternal.prototype.filterTargetsToShow = function (targets) {
+        var $$ = this;
+        return targets.filter(function (t) {
+            return $$.isTargetToShow(t.id);
+        });
+    };
+    ChartInternal.prototype.mapTargetsToUniqueXs = function (targets) {
+        var $$ = 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;
+        });
+    };
+    ChartInternal.prototype.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]);
+            }
+        }
+    };
+    ChartInternal.prototype.removeHiddenTargetIds = function (targetIds) {
+        this.hiddenTargetIds = this.hiddenTargetIds.filter(function (id) {
+            return targetIds.indexOf(id) < 0;
+        });
+    };
+    ChartInternal.prototype.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]);
+            }
+        }
+    };
+    ChartInternal.prototype.removeHiddenLegendIds = function (targetIds) {
+        this.hiddenLegendIds = this.hiddenLegendIds.filter(function (id) {
+            return targetIds.indexOf(id) < 0;
+        });
+    };
+    ChartInternal.prototype.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;
+    };
+    ChartInternal.prototype.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;
+    };
+    ChartInternal.prototype.hasNegativeValueInTargets = function (targets) {
+        return this.checkValueInTargets(targets, function (v) {
+            return v < 0;
+        });
+    };
+    ChartInternal.prototype.hasPositiveValueInTargets = function (targets) {
+        return this.checkValueInTargets(targets, function (v) {
+            return v > 0;
+        });
+    };
+    ChartInternal.prototype.isOrderDesc = function () {
+        var config = this.config;
+        return typeof config.data_order === 'string' && config.data_order.toLowerCase() === 'desc';
+    };
+    ChartInternal.prototype.isOrderAsc = function () {
+        var config = this.config;
+        return typeof config.data_order === 'string' && config.data_order.toLowerCase() === 'asc';
+    };
+    ChartInternal.prototype.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);
+            };
+        }
+    };
+    ChartInternal.prototype.orderTargets = function (targets) {
+        var fct = this.getOrderFunction();
+        if (fct) {
+            targets.sort(fct);
+        }
+        return targets;
+    };
+    ChartInternal.prototype.filterByX = function (targets, x) {
+        return this.d3.merge(targets.map(function (t) {
+            return t.values;
+        })).filter(function (v) {
+            return v.x - x === 0;
+        });
+    };
+    ChartInternal.prototype.filterRemoveNull = function (data) {
+        return data.filter(function (d) {
+            return isValue(d.value);
+        });
+    };
+    ChartInternal.prototype.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];
+                })
+            };
+        });
+    };
+    ChartInternal.prototype.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;
+    };
+    ChartInternal.prototype.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;
+    };
+    ChartInternal.prototype.isNoneArc = function (d) {
+        return this.hasTarget(this.data.targets, d.id);
+    }, ChartInternal.prototype.isArc = function (d) {
+        return 'data' in d && this.hasTarget(this.data.targets, d.data.id);
+    };
+    ChartInternal.prototype.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 $$.findClosest(candidates, pos);
+    };
+    ChartInternal.prototype.findClosest = function (values, pos) {
+        var $$ = 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;
+    };
+    ChartInternal.prototype.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));
+    };
+    ChartInternal.prototype.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;
+    };
+    ChartInternal.prototype.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];
+        });
+        $$.redraw({
+            withLegend: true
+        });
+        return current;
+    };
+
+    ChartInternal.prototype.load = function (targets, args) {
+        var $$ = 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
+        $$.redraw({ withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true });
+
+        if (args.done) {
+            args.done();
+        }
+    };
+    ChartInternal.prototype.loadFromArgs = function (args) {
+        var $$ = 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 {
+            $$.load(null, args);
+        }
+    };
+    ChartInternal.prototype.unload = function (targetIds, done) {
+        var $$ = 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 = $$.data.targets.filter(function (t) {
+                return t.id !== id;
+            });
+        });
+    };
+
+    ChartInternal.prototype.getYDomainMin = function (targets) {
+        var $$ = 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]);
+        }));
+    };
+    ChartInternal.prototype.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 $$.d3.max(ys[key]);
+        }));
+    };
+    ChartInternal.prototype.getYDomain = function (targets, axisId, xDomain) {
+        var $$ = 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;
+    };
+    ChartInternal.prototype.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 $$.d3.min(t.values, function (v) {
+                return v.x;
+            });
+        });
+    };
+    ChartInternal.prototype.getXDomainMax = function (targets) {
+        var $$ = 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;
+            });
+        });
+    };
+    ChartInternal.prototype.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 = $$.getMaxDataCount();
+            padding = maxDataCount > 1 ? diff / (maxDataCount - 1) / 2 : 0.5;
+        } else {
+            padding = diff * 0.01;
+        }
+        if (_typeof(config.axis_x_padding) === 'object' && notEmpty(config.axis_x_padding)) {
+            paddingLeft = isValue(config.axis_x_padding.left) ? config.axis_x_padding.left : padding;
+            paddingRight = isValue(config.axis_x_padding.right) ? config.axis_x_padding.right : padding;
+        } else if (typeof config.axis_x_padding === 'number') {
+            paddingLeft = paddingRight = config.axis_x_padding;
+        } else {
+            paddingLeft = paddingRight = padding;
+        }
+        return { left: paddingLeft, right: paddingRight };
+    };
+    ChartInternal.prototype.getXDomain = function (targets) {
+        var $$ = 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 = $$.isTimeSeries() ? new Date(lastX.getTime() + padding.right) : lastX + padding.right;
+        }
+        return [min, max];
+    };
+    ChartInternal.prototype.updateXDomain = function (targets, withUpdateXDomain, withUpdateOrgXDomain, withTrim, domain) {
+        var $$ = 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 $$.x.domain();
+    };
+    ChartInternal.prototype.trimXDomain = function (domain) {
+        var zoomDomain = this.getZoomDomain(),
+            min = zoomDomain[0],
+            max = zoomDomain[1];
+        if (domain[0] <= min) {
+            domain[1] = +domain[1] + (min - domain[0]);
+            domain[0] = min;
+        }
+        if (max <= domain[1]) {
+            domain[0] = +domain[0] - (domain[1] - max);
+            domain[1] = max;
+        }
+        return domain;
+    };
+
+    ChartInternal.prototype.drag = function (mouse) {
+        var $$ = 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($$, !isSelected, shape, d, i);
+            }
+        });
+    };
+
+    ChartInternal.prototype.dragstart = function (mouse) {
+        var $$ = 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);
+        $$.dragging = true;
+    };
+
+    ChartInternal.prototype.dragend = function () {
+        var $$ = 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);
+        $$.dragging = false;
+    };
+
+    ChartInternal.prototype.getYFormat = function (forArc) {
+        var $$ = 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);
+        };
+    };
+    ChartInternal.prototype.yFormat = function (v) {
+        var $$ = this,
+            config = $$.config,
+            format = config.axis_y_tick_format ? config.axis_y_tick_format : $$.defaultValueFormat;
+        return format(v);
+    };
+    ChartInternal.prototype.y2Format = function (v) {
+        var $$ = this,
+            config = $$.config,
+            format = config.axis_y2_tick_format ? config.axis_y2_tick_format : $$.defaultValueFormat;
+        return format(v);
+    };
+    ChartInternal.prototype.defaultValueFormat = function (v) {
+        return isValue(v) ? +v : "";
+    };
+    ChartInternal.prototype.defaultArcValueFormat = function (v, ratio) {
+        return (ratio * 100).toFixed(1) + '%';
+    };
+    ChartInternal.prototype.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;
+    };
+
+    ChartInternal.prototype.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) {
+            $$.initGridLines();
+        }
+    };
+    ChartInternal.prototype.initGridLines = function () {
+        var $$ = 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);
+        $$.xgridLines = d3.selectAll([]);
+    };
+    ChartInternal.prototype.updateXGrid = function (withoutUpdate) {
+        var $$ = 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', $$.xgridAttr.y1).attr('y2', $$.xgri