ECMAScript 6 入门

备忘录：

windows下面的nvmw和nvm

windows支持的不好了（nvmw无法安装node，后来发现目录结构已经变化了）
还是果断使用ubuntu吧。

几个node不同版本对es6的支持程度

使用es-checker的结果

• node v4.4.7
  nvm install 4
  Passes 29 feature Detections
  Your runtime supports 69% of ECMAScript 6

• node v6.3.1
  nvm install 6
  Passes 37 feature Detections
  Your runtime supports 88% of ECMAScript 6

• node 7没有正式版本，所以nvm无法安装
  注意：

• nvm install node这条命令已经不支持了

• 为了加速使用了cnpm
  但是cnpm连babel-cli都安装不了
  最后还是使用npm安装的
  在 ~/.npmrc文件中修改为taobao registry

  registry = http://registry.npm.taobao.org

项目测试

mkdir testproject
cd testproject
npm init
npm install webpack babel-cli  babel-preset-es2015 babel-preset-stage-3  babel-loader --save-dev
npm install babel-core babel-polyfill --save

vi .babelrc

{
  "presets": ["es2015","stage-3"],
  "plugins": []
}

为了使用打包工具webpack，需要在在module添加loaders,参考
Using Babel-How to use Babel with your tool of choice
查看package.json

{
  "name": "testproject",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "dependencies": {
    "babel-core": "^6.13.2",
    "babel-polyfill": "^6.13.0"
  },
  "devDependencies": {
    "babel-cli": "^6.11.4",
    "babel-loader": "^6.2.4",
    "babel-preset-es2015": "^6.13.2",
    "babel-preset-stage-3": "^6.11.0",
    "css-loader": "^0.23.1",
    "style-loader": "^0.13.1",
    "webpack": "^1.13.1"
  },
  "scripts": {
    "build": "babel src -d lib"
  },
  "author": "",
  "license": "ISC"
}

查看webpack.config.js

module: {
  loaders: [
    { test: /\.js$/, exclude: /node_modules/, loader: "babel-loader" }
  ]
}