babel js grunt task

babel.js

//npm install --save-dev grunt-babel babel-preset-es2015
'use strict';

module.exports = {
    options: {
        sourceMap: true,
        presets: ['es2015']
    },
    dist: {
        files: [{
            expand: true,
            cwd: 'web',
            src: ['**/*.js'],
            dest: 'dist/web',
            ext: '.js'
        }, {
            'dist/app.js': 'app.js'
        }]
    }
};

// grunt.registerTask('dev', [
//     'babel'
// ]);