Grunt build example with JavaScript and CSS concatentation and minification

Gruntfile.js

'use strict';

module.exports = function (grunt) {

	// load all grunt tasks
	require('load-grunt-tasks')(grunt);

	grunt.initConfig({

		/* loads the package json file, which can then be used as the pkg. variable */
		pkg: grunt.file.readJSON('package.json'),

		/* combines the javascript files in the correct order in prep for minification */
		concat: {
			js: {
				files: [
					{
						/* List all the .js files your site uses here in the order they need to be combined */
						src: [
							'js/jquery-ui-1.10.4.js',
							'js/site.js',
							'js/some_other_feature.js'
						],

						dest: 'build/app.js'
					},
					{
						/* List all the .css file your site uses in the order they need to be combined */
						src: [
							'css/reset.css',
							'css/fonts.css',
							'css/site.css',
							'css/responsive_1000.css',
							'css/responsive_750.css',
							'css/responsive_500.css'
						],

						dest: 'build/app.css'
					}
				],
			}
		},

		
		/* minifies the concatenated javascript file that represents everything the site needs to run */
		uglify: {
			options: {
				report: 'min',
				banner: '/*! MySite.com */\n'
			},
			files: {
				src:  ['build/app.js'],  // source files mask
				dest: 'build/',    // destination folder
				expand: true,    // allow dynamic building
				flatten: true,   // remove all unnecessary nesting
				ext: '.min.js'   // replace .js to .min.js
			}
		},
		
		/* minifies the concatenated CSS file that represents everything the site needs to run */
		cssmin: {
		  combine: {
			files: {
			  'build/app.min.css': ['build/app.css']
			}
		  }
		},
		
		/* removes the intermediate uncompressed concatenated files */
		clean: ['build/app.js', 'build/app.css'],
		
		/* run '$ grunt jshint' to check our javascript for linting errors */
		jshint: {
		  options: {
			jshintrc: '.jshintrc'
		  },
		  all: [
			'Gruntfile.js',
			'js/site.js',
			'js/some_other_feature.js'
		  ]
		},
		
	});

	// load plugins
	grunt.loadNpmTasks('grunt-contrib-uglify');
	grunt.loadNpmTasks('grunt-contrib-cssmin');
	grunt.loadNpmTasks('grunt-contrib-clean');
	grunt.loadNpmTasks('grunt-contrib-jshint');

	// register tasks
	grunt.registerTask('minify', [ 'concat', 'uglify', 'cssmin', 'clean' ]);
	grunt.registerTask('lint', [ 'jshint' ]);

};