Share data between two child components(sibling components) through a service in Angular

Question

Child Component 1
I am having a date picker field which will be used as a filter to fetch the results and display it in Child Component 2 . Meanwhile, I have created a service and share data from Child Component 1 to that service.

Child Component 2
I am able to subscribe to the data on ngOnInit() method.

My expectation :
But since this date picker changes often to filter the results, I want to subscribe to it in Child Component 2 outside ngOnInit() ie I want to subscribe to real-time data.

Note : No code change has been made in the parent component

Child Component 1.ts

shareDate(fromDateEvent){
    const fromDate = fromDateEvent.target.value;
    this.sharedService.updateFilterDate(fromDate);
}

Service.ts

private filterDate = new BehaviorSubject<string>(null);
get filterDate$(): Observable<string> {
        return this.filterDate.asObservable();
}
updateFilterDate(fromDate: string): void{
      this.filterDate.next(fromDate);
}

Child Component 2

this.sharedService.updateFilterDate.subscribe(dateValue => this.fromDate = dateValue);

Answer 1

In child component 2 make this change

this.sharedService.filterDate$().subscribe(dateValue => this.fromDate = dateValue);

You have to subscribe to the observable to get the stream of data.