thanks man for fast reply u were a great help i did what u said but still
the view is not changing with the change in the variable
[image: newquery.PNG]
the highlighted service is called but the code after that is not called i
have no idea why

On Fri, Aug 10, 2018 at 11:10 AM Sander Elias <[email protected]> wrote:

> Hi Munim,
>
> Use a subject in your service, or use a route parameter.
>
> @Inject({ provideIn: 'root' })
> class CommService {
> private sub = new Subject<any>();
> public update$ = this.sub.asObservable();
>
> public update(newVal) {
> this.sub.next(newVal);
> }
> }
>
> In your child, subscribe to update$, in your parent use the update method.
>
> Regards
> Sander
>
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