/Javascript/AngularJS/Angular event emitter

Angular event emitter

  @Output() open: EventEmitter<any> = new EventEmitter();


  toggel() {
  	this.open.emit(null);
  }

Source: angular.io

Eventemitter in angular

So, how to use it properly?
Simply use it to emit events from your component. Take a look a the following example.

@Component({
    selector : 'child',
    template : `
        <button (click)="sendNotification()">Notify my parent!</button>
    `
})
class Child {
    @Output() notifyParent: EventEmitter<any> = new EventEmitter();
    sendNotification() {
        this.notifyParent.emit('Some value to send to the parent');
    }
}

@Component({
    selector : 'parent',
    template : `
        <child (notifyParent)="getNotification($event)"></child>
    `
})
class Parent {
    getNotification(evt) {
        // Do something with the notification (evt) sent by the child!
    }
}
How not to use it?
class MyService {
    @Output() myServiceEvent : EventEmitter<any> = new EventEmitter();
}
Stop right there... you're already wrong...

Source: stackoverflow.com

What does event emitter do in angular

Data flows into your component via property bindings and flows out of your component through event bindings. If you want your component to notify his parent about something you can use the Output decorator with EventEmitter to create a custom event.

Similar codes

1 vote230 views1 answer
Angular one array contains any of second
Javascript AngularJS
0 vote179 views2 answers
Unknown Provider angularjs
Javascript AngularJS
0 vote221 views1 answer
Reactive forms angular conditional disabling
Javascript AngularJS
0 vote163 views2 answers
Fs in angular
Javascript AngularJS
0 vote155 views1 answer
Hashtag strategy angular
Javascript AngularJS
-1 vote174 views1 answer
Angularjs socket.io
Javascript AngularJS
0 vote160 views1 answer
Angularjs select placeholder
Javascript AngularJS
0 vote221 views2 answers
Convert text to qr code in angular
Javascript AngularJS
0 vote163 views1 answer
Angular 9 dockerfile
Javascript AngularJS
0 vote166 views1 answer
Angular erro ao adicionar um projeto no firebase Failed to make request to https://www.gstatic.com/firebasejs/releases.json
Javascript AngularJS