import { Injectable } from '@angular/core'; import { BehaviorSubject } from 'rxjs'; @Injectable({ providedIn: 'root', }) export class SharedDataService { constructor() {} private _tabbarIsHidden = new BehaviorSubject(false); public tabbarIsHidden$ = this._tabbarIsHidden.asObservable(); public updateTabbarState(state: boolean): void { this._tabbarIsHidden.next(state); } }