/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 vote256 views1 answer
Angularjs datetime
Javascript AngularJS
0 vote266 views1 answer
Read xlsx file in angular 5
Javascript AngularJS
0 vote257 views2 answers
Angular 4200 on ec2 access is localhost
Javascript AngularJS
0 vote232 views2 answers
Unknown Provider angularjs
Javascript AngularJS
0 vote262 views1 answer
Retrieve list by id from firebase angular
Javascript AngularJS
0 vote239 views1 answer
Angular create project in current directory
Javascript AngularJS
10 votes264 views5 answers
Angularjs foreach
Javascript AngularJS
3 votes253 views2 answers
Angular background image
Javascript AngularJS
2 votes248 views2 answers
Angularjs 1.5.6 cdn
Javascript AngularJS
0 vote248 views1 answer
Hashtag strategy angular
Javascript AngularJS