anchor.diff:  - var _pBD_bootstrapModule = _docsFor == 'dart' ? _bootstrapModule : 'platformBrowserDynamic().bootstrapModule'
   .l-verbose-section
     :marked
  -    We import the two things we need to launch the application:
  +    This imports the two things Angular needs to launch the QuickStart application:
   
       1. Angular's browser `!{_platformBrowserDynamicVsBootStrap}` function
       1. The application !{_moduleVsRootComp}, `!{_AppModuleVsAppComp}`.
   
       Then we call `!{_pBD_bootstrapModule}` with `!{_AppModuleVsAppComp}`.
   
  -    ### Bootstrapping is platform-specific
  -
  -    Notice that we import the `!{_platformBrowserDynamicVsBootStrap}` function 
  -    from `#{_angular_browser_uri}`, not `#{_angular_core_uri}`.
  -    Bootstrapping isn't core because there isn't a single way to bootstrap the app.
  -    True, most applications that run in a browser call the bootstrap function from
  -    this library.
  -
  -    But it is possible to load a !{_moduleVsComp} in a different environment.
  -    We might load it on a mobile device with [Apache Cordova](https://cordova.apache.org/) or [NativeScript](https://www.nativescript.org/).
  -    We might wish to render the first page of our application on the server
  -    to improve launch performance or facilitate
  -    [SEO](http://www.google.com/webmasters/docs/search-engine-optimization-starter-guide.pdf).
  -    These targets require a different kind of bootstrap function that we'd import from a different library.
  -
  -    ### Why create separate *<span ngio-ex>main.ts</span>*<span if-docs="ts">, app module</span> and app component files?
  +  .callout.is-helpful
  +    header Bootstrapping is platform-specific
  +
  +    :marked
  +      Because the QuickStart application runs directly in the browser, `main.ts` imports the
  +      `!{_platformBrowserDynamicVsBootStrap}` function from `#{_angular_browser_uri}`, not
  +      `#{_angular_core_uri}`. On a mobile device, you might load a !{_moduleVsComp} with
  +      [Apache Cordova](https://cordova.apache.org/) or
  +      [NativeScript](https://www.nativescript.org/), using a bootstrap function that's specific
  +      to that platform.
  +
  +  :marked
  +   ### Why create separate *<span ngio-ex>main.ts</span>*<span if-docs="ts">, app module</span> and app component files?
   
       Then <span ngio-ex>main.ts</span><span if-docs="ts">, app module</span>
       and the app component files are tiny.
  
positive.code: .l-main-section
  h1#root-component Step 2: Create the application's root component
  :marked
    **Create #{_an} #{_appDir} subfolder** off the project root directory:
  
  code-example.
  
negative.code:     makes it possible for you to keep payload size small by only importing the parts of Angular
      that your application needs.
  
      Every Angular application has at least one module: the _root module_, named `AppModule` by
      convention.
  
      Create the file `app/app.module.ts` with the following content:
  
  