How can data be accessed in an Angular 2 service the right way?

Currently, I have established a local instance of the service and am directly accessing data from it. I'm wondering if this approach is incorrect for a simple use case like sharing data between components. While trying to understand some fundamental ng2 concepts, I believe there may be a more suitable option available.

For example:

export class FormTwoComponent implements OnInit {
    private model: WinnerModel;

    constructor(private formService: FormService, private router: Router) {}

    ngOnInit() {
        this.model = this.formService.winnerModel;
    }

    onSubmit() {
        this.formService.winnerModel = this.model;
        this.router.navigate(['/form/3'])
    }
}

Thank you

Answer №1

Angular's documentation provides valuable insights into component interactions. One aspect that may not be immediately clear is the importance of referencing objects to ensure data consistency in components. To illustrate:

By assigning component.variable = service.variable, only the current value of the service variable is captured. Any future changes to the service variable will not automatically reflect in the component.
On the other hand, linking component.object = service.object establishes a direct connection. Consequently, any modifications or updates made to the service object will promptly notify and update the component reference.

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