Angular 2 CRUD in Angular2 with Restful API
Syntax
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@Injectable() // Tells dependency injector to inject dependencies when creating instance of this service.
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request.subscribe() // This is where you actually make the request. Without this your request won't be sent. Also you want to read response in the callback function.
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constructor(private wikiService: WikipediaService) { } // Since both our service and it's dependencies are injectable by the dependency injector it's a good practice to inject the service to component for unit testing the app.
