Class Overview
class EventEmitter extends Subject {emit(value?: T)
subscribe(generatorOrNext?: any, error?: any, complete?: any) : any
}
Class Description
Use by directives and components to emit custom Events.
Examples
In the following example, Zippy alternatively emits open and close events when its
title gets clicked:
@Component({
selector: 'zippy',
template: `
<div class="zippy">
<div (click)="toggle()">Toggle</div>
<div [hidden]="!visible">
<ng-content></ng-content>
</div>
</div>`})
export class Zippy {
visible: boolean = true;
@Output() open: EventEmitter<any> = new EventEmitter();
@Output() close: EventEmitter<any> = new EventEmitter();
toggle() {
this.visible = !this.visible;
if (this.visible) {
this.open.emit(null);
} else {
this.close.emit(null);
}
}
}
The events payload can be accessed by the parameter $event on the components output event
handler:
<zippy (open)="onOpen($event)" (close)="onClose($event)"></zippy>
Uses Rx.Observable but provides an adapter to make it work as specified here:
https://github.com/jhusain/observable-spec
Once a reference implementation of the spec is available, switch to it.
Constructor
constructor(isAsync?: boolean)
Creates an instance of [EventEmitter], which depending on [isAsync],
delivers events synchronously or asynchronously.
Class Details
emit(value?: T)
subscribe(generatorOrNext?: any, error?: any, complete?: any) : any
exported from @angular/core/index,
defined in @angular/core/src/facade/async.ts