What's the most effective method for transferring data to different components?

How can I efficiently pass a user info object to all low-level components, even if they are grandchildren? Would using @input work or is there another method to achieve this?

Here is the code for my root component:

  constructor(private _state: GlobalState,
              private _imageLoader: BaImageLoaderService,
              private _spinner: BaThemeSpinner, public af: AngularFire) {

    this._loadImages();

    this._state.subscribe('menu.isCollapsed', (isCollapsed) => {
      this.isMenuCollapsed = isCollapsed;
    });

    // this.af.auth.subscribe(
    //   user => this._changeState(user),

    this.af.auth.subscribe(user => this._changeState(user));

  }

Answer №1

Have you thought about utilizing a service class? These are singletons, meaning the same instance is injected into every component that requests it.

https://angular.io/docs/ts/latest/guide/dependency-injection.html

A basic example would be as follows:

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

@Injectable()
export class DummyService {
    public userInfo: UserInfo = {
        //User information goes here
    };
}

To use this in a component, you can do the following:

import {DummyService} from 'dummy.service';

@Component({
  selector: 'my-component',
  templateUrl: 'my.component.html'
})
export class MyComponent{
  constructor(private myDummyService: DummyService){}
}

By doing this, the same instance of the class will be injected into each component using it at runtime. It's a convenient way to keep data synchronized across multiple components.

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