gruntfile.js

module.exports = function(grunt) {
  require('load-grunt-tasks')(grunt);

  // Project configuration.
  grunt.initConfig({
    browserify: {
      app_dev: {
        options: {
          watch: true,
          keepAlive: false,
          transform: ['babelify'],
          browserifyOptions: {
            debug: true
          }
        },
        files: {
          'dest/js/app.js': ['./source/**/*.js']
        }
      },
      app_release: {
        options: {
          transform: ['babelify', 'uglifyify'],
        },
        files: {
          'dest/js/app.min.js': ['./source/**/*.js']
        }
      }
    },
    watch: {
      app: {
        files: 'dest/js/app.js',
        options: {
          livereload: true
        }
      }
    },
    jshint: {
      options: {
        esnext: true
      },
      app: ['./source/**/*.js']
    }
  });

  // Default task(s).
  grunt.registerTask('default', ['browserify:app_dev']);
  grunt.registerTask('dev', ['browserify:app_dev', 'watch:app']);
  grunt.registerTask('validate', ['jshint:app']);
  grunt.registerTask('release', ['validate', 'browserify:app_release']);

};