Cordova, Grunt and Coffee

You may reference to below if you deside to work with coffee instead of Javascript in Cordova project.

Prepare Cordova Helloworld Project

This guide is based on Hello World project which is generated by the following commands.

$ cordova create hello com.example.hello HelloWorld
$ cd hello
$ cordova platform add android

Install

Install coffee Command

$ npm install -g coffee

Install grunt-contrib-coffee Grunt Plugin

$ npm install grunt-contrib-coffee --save-dev

Generate Working Tree

Transform www/js/index.js to src/www/js/index.coffee in example project. Because, we are gotta remote all the javascript file in folderwww/js/.

File src/www/js/index.coffee:

app = 
    initialize: () -> this.bindEvents()

    bindEvents: () ->
        document.addEventListener ‘deviceready‘, this.onDeviceReady, false

    onDeviceReady: () ->
        app.receivedEvent ‘deviceready‘

    receivedEvent: (id) ->
        parentElement = document.getElementById id
        listeningElement = parentElement.querySelector ‘.listening‘
        receivedElement = parentElement.querySelector ‘.received‘

        listeningElement.setAttribute ‘style‘, ‘display:none;‘
        receivedElement.setAttribute ‘style‘, ‘display:block;‘

        console.log ‘Received Event: ‘ + id

Update Gruntfile.coffee

module.exports = (grunt) ->
    grunt.initConfig
        pkg: grunt.file.readJSON ‘package.json‘
        coffee:
            options:
                bare: true
            build:
                expand: true
                cwd: ‘src/www‘
                src: [‘**/*.coffee‘]
                dest: ‘www‘
                ext: ‘.js‘
                extDot: ‘first‘

    grunt.loadNpmTasks ‘grunt-contrib-coffee‘

Now We Have

src/ folder as coffee scripts location
src/www/js/index.coffee file that tranformed from www/js/index.js which is removed already.
Gruntfile.coffee build with coffee tasks
package.json which is updated with module grunt-contrib-coffee

Testing

$ grunt coffee
$ cordova install android

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Get Cordova Ready for Grunt and CoffeeScript