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Angular2 Communicating between sibling components
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import {Component, Input, OnChanges} from "@angular/core"; | |
import {EmitterService} from "../services/emitter.service"; | |
@Component({ selector: 'dispatcher', template: '' }) | |
export class DispatcherComponent implements OnChanges { | |
@Input() id: string; | |
value = "dispatcher component value"; | |
ngOnChanges() { | |
EmitterService.get(this.id).emit(this.value); | |
} | |
} |
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import {Injectable, EventEmitter} from '@angular/core'; | |
@Injectable() | |
export class EmitterService { | |
private static _emitters: { [ID: string]: EventEmitter<any> } = {}; | |
static get(ID: string): EventEmitter<any> { | |
if (!this._emitters[ID]) | |
this._emitters[ID] = new EventEmitter(); | |
return this._emitters[ID]; | |
} | |
} |
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@Component({ selector: 'listener', template: '' }) | |
export class ListenerComponent implements OnChanges { | |
@Input() id: string; | |
ngOnChanges() { | |
EmitterService.get(this.id).subscribe(value => console.log(value)); | |
} | |
} | |
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@Component({ | |
providers: [EmitterService], | |
selector: 'host', | |
template: ` | |
<dispatcher [id]="host_id"></dispatcher> | |
<listener [id]="host_id"></listener> | |
` | |
}) | |
export class HostComponent { | |
public host_id: "HOST_COMPONENT"; | |
constructor(private _emitterService: EmitterService) {} | |
} |
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