I am trying to get the updated value from a service variable ( isSidebarVisible
), which continues to be updated by another component ( header
) with a click ( toggleSidebar
) event .
sidebar.service.ts
import { Injectable } from '@angular/core';
import { Subject } from 'rxjs/Subject';
@Injectable()
export class SidebarService {
isSidebarVisible: boolean;
sidebarVisibilityChange: Subject<boolean> = new Subject<boolean>();
constructor() {
this.isSidebarVisible = false;
}
toggleSidebarVisibilty() {
this.isSidebarVisible = !this.isSidebarVisible
this.sidebarVisibilityChange.next(this.isSidebarVisible);
}
}
sidebar.component.ts
export class SidebarComponent implements OnInit {
asideVisible: boolean;
_asideSubscription: any;
constructor(private sidebarService: SidebarService) {
this.asideVisible = sidebarService.isSidebarVisible
this._asideSubscription = sidebarService.sidebarVisibilityChange.subscribe((value) => {
this.asideVisible = value
})
}
ngOnInit() {
}
}
header.component.ts (where the service variable is updated)
export class HeaderComponent implements OnInit {
isSidebarVisible: boolean;
_subscription: any;
constructor(private sidebarService: SidebarService) {
this._subscription = sidebarService.sidebarVisibilityChange.subscribe((value) => {
this.isSidebarVisible = value
})
}
toggleSidebar() {
this.sidebarService.toggleSidebarVisibilty()
}
ngOnInit() {
}
}
I see a service variable change in header.component.html
when {{ isSidebarVisible }}
, but In sidebar.component.html
always prints the default value and never listens for changes.
Please help me fix this.
source
share