Gaining insight from a separate module

Question

Gaining insight from a separate module

Can events be passed to other components without requiring the component's selector?

Answer 1

Answer №1

Indeed, one of the most popular solutions is utilizing a service to inject into both components, allowing for the creation of props on the service to store data. This enables easy access to these props from both components. It's advisable to incorporate 'BehaviorSubject' to subscribe to any changes in the data.

Here is an example demonstrating this concept

Learn about Using Behavior Subject with Rxjs here

Below is an illustrative example:

Service

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

@Injectable({
  providedIn: 'root'
})
export class ShareDataService {
 public sharedData :BehaviorSubject<number>= new BehaviorSubject(0);
  constructor() { }
}

First Component (responsible for changing data)

import { Component, OnInit } from '@angular/core';
import { ShareDataService } from '../share-data.service';

@Component({
  selector: 'app-first',
  templateUrl: './first.component.html',
  styleUrls: ['./first.component.css']
})
export class FirstComponent implements OnInit {

  firstModel: number;
  constructor(private dataService: ShareDataService) {
  }

  ngOnInit() {

  }
  changeDataOnTheSecondComp(input) {
    console.log(input);
    this.dataService.sharedData.next(input.value)
  }
}

The Second Component (receives updated data)

import { Component, OnInit } from '@angular/core';
import { ShareDataService } from '../share-data.service';
import { Subject } from 'rxjs';

@Component({
  selector: 'app-second',
  templateUrl: './second.component.html',
  styleUrls: ['./second.component.css']
})
export class SecondComponent implements OnInit {

  secondModel: number;
  constructor(private dataService: ShareDataService) {
  }

  ngOnInit() {
    this.dataService.sharedData.subscribe(x => {
      this.secondModel = x;
    })
  }

}

Answer 2

Indeed, one of the most popular solutions is utilizing a service to inject into both components, allowing for the creation of props on the service to store data. This enables easy access to these props from both components. It's advisable to incorporate 'BehaviorSubject' to subscribe to any changes in the data.

Here is an example demonstrating this concept

Learn about Using Behavior Subject with Rxjs here

Below is an illustrative example:

Service

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

@Injectable({
  providedIn: 'root'
})
export class ShareDataService {
 public sharedData :BehaviorSubject<number>= new BehaviorSubject(0);
  constructor() { }
}

First Component (responsible for changing data)

import { Component, OnInit } from '@angular/core';
import { ShareDataService } from '../share-data.service';

@Component({
  selector: 'app-first',
  templateUrl: './first.component.html',
  styleUrls: ['./first.component.css']
})
export class FirstComponent implements OnInit {

  firstModel: number;
  constructor(private dataService: ShareDataService) {
  }

  ngOnInit() {

  }
  changeDataOnTheSecondComp(input) {
    console.log(input);
    this.dataService.sharedData.next(input.value)
  }
}

The Second Component (receives updated data)

import { Component, OnInit } from '@angular/core';
import { ShareDataService } from '../share-data.service';
import { Subject } from 'rxjs';

@Component({
  selector: 'app-second',
  templateUrl: './second.component.html',
  styleUrls: ['./second.component.css']
})
export class SecondComponent implements OnInit {

  secondModel: number;
  constructor(private dataService: ShareDataService) {
  }

  ngOnInit() {
    this.dataService.sharedData.subscribe(x => {
      this.secondModel = x;
    })
  }

}

Gaining insight from a separate module

Answer №1

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