module.exports = {  devtool: 'cheap-module-source-map',  entry: './app/js/index.js'  output: {    path: path.resolve(__dirname, 'dev'),    // 所有輸出文件的目標路徑    filename: 'js/bundle.js',    publicPath: '/',    chunkFilename: '[name].chunk.js'  },  devServer: {    contentBase: path.resolve(__dirname, 'dev'),    publicPath: '/',    historyApiFallback: true,    proxy: {      // 請求到 '/device' 下 的請求都會被代理到 target： http://debug.xxx.com 中      '/device/*': {         target: 'http://debug.xxx.com',        secure: false, // 接受 運行在 https 上的服務        changeOrigin: true      }    }  }}

  fetch('/device/space').then(res => {    // 被代理到 http://debug.xxx.com/device/space    return res.json();  }).then(res => {    console.log(res);  })  fetch('device/space').then(res => {    // http://localhost:8080/device/space 訪問本地服務    return res.json();  }).then(res => {    console.log(res);  })