Es6的开发环境

1. 项目初始化

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npm init -y

2. 全局安装babel-cli

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npm install -g babel-cli

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

3. 在根目录下创建.babelrc

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{
    "presets": [
        "es2015"
    ],
    "plugins": []
}

4. 转换输出

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babel src/index.js -o dist/index.js

5. 简化转换输出

---

  "scripts": {
    "build": "babel src/index.js -o dist/index.js"
  },

6. npm run build