code.js

private filterDataSource: BehaviorSubject<Array<any>> = new BehaviorSubject([]);

    public filterData = this.filterDataSource.asObservable();

    updateUserData(data) {
        this.filterDataSource.next(data);
    }

    addData(dataObj) {
        const currentValue = this.filterDataSource.value;
        const updatedValue = [...currentValue, dataObj];
        this.filterDataSource.next(updatedValue);
    }
  constructor() { }