DoBootstrap
Hook for manual bootstrapping of the application instead of using bootstrap array in @NgModule annotation.
      
      interface DoBootstrap {
  ngDoBootstrap(appRef: ApplicationRef): void
}
    说明
Reference to the current application is provided as a parameter.
See "Bootstrapping" and "Entry components".
方法
使用说明
      
      class AppModule implements DoBootstrap {
  ngDoBootstrap(appRef: ApplicationRef) {
    appRef.bootstrap(AppComponent); // Or some other component
  }
}
    