child parent communication best practices in Angular

Question

I\'m trying to become better at Angular and I want to know the best practices between child-parent communication. My current app I want to work on is on Angular 6. I know I

Answer 1

You can subject to Share Data between multiple Component

Create Service

 import { Injectable } from '@angular/core';
    import {Subject} from 'rxjs/Subject';    
    @Injectable()
    export class ChildParentService {

     data=new Subject();
      constructor() { }

    }

Example:https://stackblitz.com/edit/child-to-parent-bntt2h