Migrating to Angular 2 (Video 14)

This video tutorial guides viewers through the process of upgrading an application to Angular 2. It covers the use of Ng Upgrade and Upgrade Adapter to facilitate the migration, preparing the application by removing Ng app declarations, and updating package.json and index.html. The tutorial also explains how to migrate services to Angular 2, making them injectable and backwards compatible. Finally, it discusses dependency injection in Angular 2 using TypeScript constructors and providers.

What is the primary purpose of the NgUpgrade package in the migration process?

• To downgrade Angular 2 components to Angular 1.x

• To remove Angular 1.x code entirely

• To upgrade Angular 2 components to Angular 3

• To facilitate the mixing of Angular 1.x and Angular 2 code

What is the role of the UpgradeAdapter in the migration process?

• To convert Angular 2 code to Angular 1.x

• To upgrade Angular 2 code to Angular 3

• To allow Angular 1.x and Angular 2 code to coexist

• To remove Angular 1.x code

What must be removed from the HTML code when preparing for the Angular 2 upgrade?

• Ng-repeat

• Ng-app

• Ng-model

• Ng-controller

What is the first step in preparing the application for the Angular 2 upgrade?

• Adding Angular 2 to the package.json file

• Creating new Angular 2 components

• Updating the CSS files

• Removing all Angular 1.x components

How are Angular 2 services made injectable?

• By using the NgService annotation

• By adding an Injectable annotation

• By adding a Service annotation

• By using the NgInject annotation

What is a key feature of Angular 2 services compared to Angular 1.x?

• They are modules

• They are functions

• They are directives

• They are classes

What is used in TypeScript to inject objects based on class names?

• Modules

• Interfaces

• Destructors

• Constructors