Sharing Array Data Between Child Components in Angular Using TypeScript

I've been attempting to pass an array from one child component to another without success. Despite following various online tutorials on using a service to share data, my page fails to load anything.

The issue that was causing problems in my program was adding the DataService to the constructor:

import { DataService } from '../data.service';

export class BodyComponent implements OnInit{
  films = [{Title: "Finding Nemo", Rating: "3.5"}, {Title: "Rambo", Rating: "4.0"}];
  constructor(private http: HttpClient, private data: DataService) { }
}

data.service.ts

import { Injectable } from '@angular/core';
import { BehaviorSubject } from 'rxjs';

@Injectable()
export class DataService {

  private finalNoms = new BehaviorSubject<any>([]);
  currentNoms = this.finalNoms.asObservable();

  constructor() { }

  changeNominations(nom: Object){
    this.finalNoms.next(nom);
  }

}

Answer №1

When working with Angular, the data management is typically handled by services. To ensure smooth operation, it's important to define your data within the service itself. For example, you can initialize an array of films like this:

films = [{Title: "The Lion King", Rating: "4.5"}, {Title: "Toy Story", Rating: "3.8"}];
. Then, in your component, you can access this data by including the following line in either the constructor or ngOnInit method:

this.films = this.data.films;

Additionally, when naming your service in the component, it's recommended to use a more descriptive name such as dataService instead of justdata for clarity and consistency.

Answer №2

Don't forget to include the location where your service is available:

@Injectable({
  providedIn: 'root',
}) 

By adding this, you should be able to resolve any issues.

Answer №3

When attempting to transfer an array of information between two child components, it is recommended to establish 2 ViewChilds within the parent component. The data can then be sent up to the parent using EventEmitter and subsequently relayed down to the other child component.

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