无法通过 BehaviorSubject 访问数据的属性。 BehaviorSubject 上不存在属性

Question

While using BehaviourSubject to set shared data across my application, I am unable to access the properties of the data. Getting error :-

**

property does not exist on type 'BehaviourSubject'

**

SharedService.ts

setCommonData(data): void {
  this.commonData.next(data);
}
getCommonData(): Observable<BehaviorSubject<any>> {
  return this.commonData;
}

app.component.ts

// result = {id: number, name: string, info: {}}
getData(): void {
    this.dataService.getApi(url, {}, true).subscribe((result) => {
        this.sharedService.setCommonData(result);
    }
}

child.component.ts

displayData(): void {
    this.sharedService.getCommonData().subscribe((data) => {
         this.displatData = data // works
         this.info = data.info // property info does not exist on type 'BehaviourSubject<any>'
    });
}

Answer 1

You're returning an observable of the BehaviorSubject . Instead you need to return the BehaviorSubject as an observable.

Try the following

setCommonData(data): void {
  this.commonData.next(data);
}

getCommonData(): Observable<any> {         // <-- return `Observable` here
  return this.commonData.asObservable();
}