/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

1 vote182 views1 answer
Saturn range in angular display end date
Javascript AngularJS
0 vote177 views1 answer
Datatable shows No data available in table in angular
Javascript AngularJS
0 vote174 views2 answers
SaveAs method of file-saver in angular
Javascript AngularJS
0 vote222 views1 answer
Module not found error can't resolve 'rxjs/observable' angular 8
Javascript AngularJS
0 vote166 views1 answer
How to update angular core in ionic
Javascript AngularJS
0 vote199 views1 answer
Get page link angular
Javascript AngularJS
0 vote183 views1 answer
Ngstyle background url angular
Javascript AngularJS
1 vote234 views1 answer
Angular one array contains any of second
Javascript AngularJS
0 vote178 views1 answer
Index and id together angularjs
Javascript AngularJS
-1 vote209 views2 answers
Angular generate directive
Javascript AngularJS