as value.
The featurecollection itself has a properties key as well containing the attributes of
the wrmap element.
+
+
+## Install build dependencies
+
+The following command uses `package.json` to install all dependencies
+
+ npm install
+
+
+
+## Bundle JavaScript/Typescript
+
+The TypeScript source files are below the src directory.
+To bundle them, run
+
+ npm run build
+
+Add `/*@nomin*/` close to the end of `dist/wrmap.mjs` to prevent minification bug: https://phabricator.wikimedia.org/T351610.