An illustration of the interaction between a service and component could be demonstrated as follows:
Service:
@Injectable()
export class MyService {
myMethod$: Observable<any>;
private myMethodSubject = new Subject<any>();
constructor() {
this.myMethod$ = this.myMethodSubject.asObservable();
}
myMethod(data) {
console.log(data); // Data is here! Let's pass it on to subscribers for usage!
// Additional operations with data can be performed if necessary
this.myMethodSubject.next(data);
}
}
Component1 (sender):
export class SomeComponent {
public data: Array<any> = MyData;
public constructor(private myService: MyService) {
this.myService.myMethod(this.data);
}
}
Component2 (receiver):
export class SomeComponent2 {
public data: Array<any> = MyData;
public constructor(private myService: MyService) {
this.myService.myMethod$.subscribe((data) => {
this.data = data; // Now, data is available here too!
}
);
}
}
Explanation:
MyService is responsible for managing the data. While you have the option to manipulate data, it is recommended to delegate that task to Component2.
In essence, MyService receives the data from Component1 and transmits it to any component subscribed to the myMethod() method.
Component1 sends the data to MyService and ceases its involvement.
Component2 subscribes to myMethod(), allowing it to receive and process the output whenever myMethod() is invoked.