Angular 2 Bootstrapping Options - AOT vs JIT

Question

Just kick started with Angular 2.

1. What are the various Bootstrapping options in angular 2?

2. Why is that when I make a change and refresh the index.html takes little time to retrieve the HTML markups?

3. Differences between them

Answer 1

There are two options

1. Dynamic bootstrapping

   • compiler used JIT (Just in Time).
   • dynamically compiles the ts files in the browser.
   • this is the reason the index.html takes little time to retrieve the markups.

   • main.ts contains the following

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

     2. Static bootstrapping
   • compiler used AoT (Ahead of Time).
   • The ts files are compiled into js files and then rendered to the browser.
   • By this, a set of js files containing modules and factories are created there by making them light weight.
   • Mostly used in the case of mobiles and legacy networks.

   • main.ts contains the following

     import { platformBrowser } from '@angular/platform-browser';
     import { AppModuleNgFactory }              from '../aot/app/app.module.ngfactory';
     
     platformBrowser().bootstrapModuleFactory(AppModuleNgFactory);
     

Differences