anchor.diff:    You'll need polyfills to run an Angular application in most browsers as explained
     in the [_Browser Support_](browser-support.html) guide.
   
  +  我们在[_浏览器支持_](browser-support.html)章节里解释过，Angular应用要能在大多数的浏览器里运行，它还需要一些polyfills。
  +
     Polyfills should be bundled separately from the application and vendor bundles.
     Add a `polyfills.ts` like this one to the `src/` folder.
  +
  +  Polyfills最好跟应用代码和vendor代码区分开来单独打包，所以我们需要在`src/`文件夹里添加一个`polyfills.ts`文件，代码如下：
   
   +makeExample('webpack/ts/src/polyfills.ts', '', 'src/polyfills.ts')(format=".")
   
  
positive.code:   After that brief orientation, you are ready to build your own Webpack configuration for Angular apps.
  
    经过简短的培训之后，我们准备为Angular应用构建一份自己的Webpack配置了。
    Begin by setting up the development environment.
  
    从设置开发环境开始。
  
negative.code:     If Webpack should resolve extension-less files for styles and HTML,
      add `.css` and `.html` to the list.
  
      如果我们希望Webapck也能解释不带扩展名的样式和HTML文件，在列表里追加`.css`和`.html`即可。
  
  a#common-rules
  :marked
  :marked
    #### _module.rules_
    Rules tell Webpack which loaders to use for each file (AKA _module_):
  
    Rules用来告诉Webpack加载不同文件时该用哪个加载器。
    
  +makeExample('webpack/ts/config/webpack.common.js', 'loaders', 'config/webpack.common.js')(format=".")
  
  