#For meteor 1.3+ we have Synthesis

mwc:ecmascript

For Meteor < 1.3

es6 transpiler for scripts inside the polymer import files

extension for mwc:compiler

refer https://github.com/meteorwebcomponents/extensions for more details.

Why?

Polymer components may contain es6 scripts inside html files. The default ecmascript package only transpiles script inside files with .js extension. mwc:ecmascript helps you here.

##Settings

Default Settings

{
  "root" : ".polymer",

  "append": [
    "index.html"
  ],

  "import": [

    "bower_components/polymer/polymer.html"

  ], 
  "extensions": {
    "mwc:ecmascript@1.0.10": {
      "babel":{
        "sourceMap" : false,
        "ast" : false
      },
      "limit":true,
      "log":false,
      "compileFunction": "MWCEcmascript"
    }
  }
}

1. babel

Default :

{
    sourceMap : false,
    ast : false,
    externalHelpers : true
}

Pass custom settings to babel. Refer http://babeljs.io/docs/usage/options/

2. limit

Default : true

A 100kB size limit is set by default for faster build time. It avoids bigger files like polymer.js and webcomponents.js which works fine without transpiling as of now.

3. compileFunction

Default : "MWCEcmascript"

MWCEcmascript is the default compile function. You do not need to change that.

4. log

Default : false

Log processed scripts to .mwclogs/ecmascript.txt.

5. skip_mwc_ecmascript

You can skip a script by adding the line /*skip_mwc_ecmascript*/ anywhere in the script.

###Note

Use es5-shim for older browsers. You still have to use the mdg ecmascript package for other files.

Usage

meteor add mwc:compiler meteor add mwc:ecmascript and you are good to go.