Hi, Webpack 2.x將loader換成rules webpack.config.js的內容需要修改 另外隨版本開發,webpack-cli獨立出來,因此需要獨立安裝webpack-cli babel-preset-es2015即將過期,要改裝babel-preset-env,並且在webpack.config.js中要把 presets: ['es2015', 'react'],改成presets: ["env", "react"],