grunt setup

gistfile1.txt

@Carelesslabs 
A simple Grunt setup for JS13kGames

This gruntfile will take all javascript files in source folder "assets/js/*.js" and compress them into
a single file "dst/game.min.js". Storing you minified HTML file and images in the dst folder also allows you
to compress this one dst folder for submission.

If you want individual files then change "expand: false," to " expand: true,". The "ext: '.min.js'" setting will tag min.js onto 
all of the separate files.

Grunt will need to be installed: https://gruntjs.com/installing-grunt

running "grunt" from within your project will minify all of the js files, running "grunt watch" will listen for 
changes and automatically minify.

******************************************************
// Gruntfile.js
******************************************************

module.exports = function(grunt) {
  // Project configuration.
  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),
    uglify: {
      build: {
        files: [{
          expand: false,
          src: 'assets/js/*.js',
          dest: 'dst/game.min.js',
          ext: '.min.js'
        }]
      }
    },
    watch: {
      files: ['assets/js/*.js'],
      tasks: ['uglify']
    }
  });

  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.registerTask('default', ['uglify']);
};
******************************************************
// package.json
******************************************************
{
  "name": "grunt-getting-started",
  "version": "0.1.0",
  "devDependencies": {
    "grunt": "~0.4.4",
    "grunt-contrib-uglify": "latest",
    "grunt-contrib-less": "latest",
    "grunt-contrib-cssmin": "latest",
    "grunt-contrib-watch": "latest"
  }
}

If you want to use ES then use:
grunt-contrib-uglify-es

Search for "grunt-contrib-uglify" and replace it with grunt-contrib-uglify-es