npm install webpack --save-dev

npm install --save-dev babel-core babel-preset-es2015

 npm install --save-dev babel-loader

module.exports = {

    entry: './src/js/app.js',

    output: {

        path: './dest',

        filename: 'app.bundle.js',

    },

    module: {

        loaders: [{

            test: /\.js$/,

            exclude: /node_modules/,

            loader: 'babel-loader',

        }]

    },

    babel: {

     presets: ['es2015']

   },

}