详解webpack es6 to es5支持配置

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']  },}