/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 vote140 views1 answer
Angular.json to war
Javascript AngularJS
0 vote140 views1 answer
Page reload button using angular
Javascript AngularJS
0 vote170 views2 answers
Angularjs - controllerAs
Javascript AngularJS
0 vote150 views1 answer
Angular blockly
Javascript AngularJS
7 votes128 views2 answers
Angular 6 key value pair getvalue example
Javascript AngularJS
0 vote184 views1 answer
Switch element array angular
Javascript AngularJS
0 vote135 views1 answer
Angular loop through key values in map
Javascript AngularJS
0 vote145 views1 answer
Angular navbar is overlaying content
Javascript AngularJS
0 vote127 views1 answer
You seem to not be depending on "@angular/core" and/or "rxjs". This is an error.
Javascript AngularJS
0 vote144 views1 answer
Open new tab with angular router
Javascript AngularJS