Bootstrap

To bootstrap an Angular application in the JIT mode, you pass a module to bootstrapModule:

import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {AppModule} from './app';

platformBrowserDynamic().bootstrapModule(AppModule);

This will compile AppModule into a module factory and then use the factory to instantiate the module. If you use AOT, you may need to provide the factory yourself:

import {platformBrowser} from '@angular/platform-browser';
import {AppModuleNgFactory} from './app.ngfactory';

platformBrowser().bootstrapModuleFactory(AppModuleNgFactory);

I said "may need to" because the CLI and the WebPack plugin take care of it for you. They will replace the bootstrapModule call with bootstrapModuleFactory when needed.