JavaScript Passing value to sibling component using shared service

If you wand to show the values on application load you need to change the subject to BehaviorSubject

    private _onChanged: BehaviorSubject<any> = new BehaviorSubject({});
    public val= this._onChanged.asObservable(); 

  update(input: any) { 
     this._onChanged.next(input);
  }
  constructor() { }

Demo

Answer:1

You have to bind to the right value in your display-component.component.html part:

<p>
  {{val}} <!--not {{result}}-->
</p>
Answer:2

I found a small thing in your code. instead of bellow

<p>
  {{result}}
</p>

you should use

 <p>
   {{val}}
 </p>
Answer:3

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