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                1. 命令行運行 `npm install @babel/core @babel/preset-env babel-loader --save-dev` 2. 根目錄下創建 `.babelrc` 文件 ``` { "preset": ["@babel/preset-env"], "plugins": [] } ``` 3. 打開 `webpack.dev.config.js`,添加與 `plugins` 平級的一段: ``` module: { rules: [{ test: /\.js?$/, exclude: /(node_modules)/, loader: 'babel-loader' }] }, ``` 4. 打開 `src/index.js` ``` class Person { constructor(name) { this.name = name } getName () { return this.name } } var p = new Person('老師') alert(p.getName()) ``` 5. 命令行運行 `npm run dev`,可看到打開的頁面會alert出警告框,則所寫的es6的代碼已經能被正確編譯且執行。
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