/Javascript/AngularJS/Eventemitter in angular

Eventemitter in angular

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

0 vote264 views1 answer
Scrollout js angular
Javascript AngularJS
-1 vote284 views1 answer
Date range picker in angular 8
Javascript AngularJS
0 vote293 views1 answer
Angular 12 tabs
Javascript AngularJS
0 vote309 views1 answer
Angular formData print values
Javascript AngularJS
0 vote300 views1 answer
Matmenu in angular
Javascript AngularJS
0 vote299 views1 answer
Hide element when pressing button angular
Javascript AngularJS
0 vote309 views1 answer
Angular subscribe on value change
Javascript AngularJS
0 vote289 views1 answer
Saveas angular 6
Javascript AngularJS
0 vote295 views1 answer
Onclick add active class in angular
Javascript AngularJS
0 vote290 views1 answer
Angular load json file with httpclient
Javascript AngularJS