Learn Angular: Using Services with Angular Dependency Injection

Описание: Want to learn Angular? In this video, "Learn Angular: Using Services with Angular 9 Dependency Injection", you'll learn how to use Angular dependency injection to inject services into your Angular components.

When creating and using services in an Angular 9 application, it is recommended to utilize dependency injection. Dependency injection is built into the Angular framework and can be implemented by following 3 easy steps.

1. Create a service
2. Decorate the service for injection
3. Inject the service

The easiest way to create a service is by sing the Angular CLI. Simply type:

ng g s nameOfService

There is no need to add the word "Service" at the end of the name of your service. This will be added for you automatcally by the Angular CLI

The Angular CLI will automatically decorate the newly created service class with the Injectable decorator. The decorator will provide the value of "root" for the providedIn property. This will instruct angular to register the service for use across the entire application. You can configure your service to be scoped at the component level by removing the providedIn property and adding the service class to the component's providers property array.

@Injectable()[{
providedIn: 'root'
}]

Finally, to use the service, simply request the service via the component's constructor as an argument.

constructor(private titleService: TitleService){
}

Just like that, you now have services being created and injected into your components for use throughout your Angular application by using dependency injection.

"Desktop to Web: A WPF Developers Guide to Learning Angular" is a video tutorial series that will help you take your WPF and WinForms desktop coding skill to the web with Angular. This series will help you understand how your current desktop skills map directly to concepts in Angular to make your learning path to the web as easy and painless as possible.

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UPDATE: And the winner is... Fousseni Diarra!