Simple gruntfile.js

Gruntfile.js

module.exports = function ( grunt ) {

    // Project configuration.
    grunt.initConfig( {
        concat: {
            basic: {
                src: [ 'jsResources/underscore-min.js',
                        'jsResources/product-viewer/lib/core.js',
                        'jsResources/product-viewer/lib/mediaplayer.js',
                        'jsResources/product-viewer/lib/options.js',
                        'jsResources/product-viewer/lib/utilities.js',
                        'jsResources/product-viewer/lib/preload.js',
                        'jsResources/product-viewer/lib/previewer.js',
                        'jsResources/product-viewer/lib/zoom.js',
                        'jsResources/product-viewer/lib/personalization.js',
                        'jsResources/product-viewer/lib/uploader.js'
                    ],
                dest: "jsResources/product-viewer/product-viewer.js"
            }
        },
        watch: {
            files: 'jsResources/product-viewer/lib/*.js',
            tasks: [ 'jshint', 'concat', 'uglify' ]
        },
        jshint: {
            files: ['jsResources/product-viewer/lib/*.js'],
            options: {
                force: true,
                jshintrc: "./.jshintrc"
            }
        },
        uglify: {
            options: {
                sourceMap: 'jsResources/product-viewer/product-viewer.min.js.map'
            },
            build: {
                files: {
                    'jsResources/product-viewer/product-viewer.min.js': ['jsResources/product-viewer/product-viewer.js']
                }
            }
        }
    } );

    grunt.loadNpmTasks( 'grunt-contrib-uglify' );
    grunt.loadNpmTasks( 'grunt-contrib-jshint' );
    grunt.loadNpmTasks( 'grunt-contrib-watch' );
    grunt.loadNpmTasks( 'grunt-contrib-concat' );

    // Default task.
    grunt.registerTask( 'default', ['jshint', 'concat', 'uglify'] );

};