import { Injectable } from '@angular/core'; import { Subject, Observable } from 'rxjs'; @Injectable( { providedIn: 'root' } ) export class FarrisSidebarService { private isOpenSubject = new Subject(); constructor() { } sendIsOpen(message: any) { this.isOpenSubject.next(message); } getIsOpen(): Observable { return this.isOpenSubject.asObservable(); } }