1  @Output() open: EventEmitter<any> = new EventEmitter();
2
3
4  toggel() {
5  	this.open.emit(null);
6  }	

1@Component({
2    selector : 'child',
3    template : `
4        <button (click)="sendNotification()">Notify my parent!</button>
5    `
6})
7class Child {
8    @Output() notifyParent: EventEmitter<any> = new EventEmitter();
9    sendNotification() {
10        this.notifyParent.emit('Some value to send to the parent');
11    }
12}
13
14@Component({
15    selector : 'parent',
16    template : `
17        <child (notifyParent)="getNotification($event)"></child>
18    `
19})
20class Parent {
21    getNotification(evt) {
22        // Do something with the notification (evt) sent by the child!
23    }
24}