/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

12 votes196 views5 answers
Update angular 10
Javascript AngularJS
0 vote227 views1 answer
Why my style not come to angular 11
Javascript AngularJS
0 vote236 views1 answer
Angular get first element ngfor
Javascript AngularJS
0 vote238 views1 answer
ERROR in ./src/app/pages/auth/auth.module.ngfactory.js Module not found: Error: Can't resolve '@angular/material/core/index'
Javascript AngularJS
0 vote190 views1 answer
Angular append to FormControl errors
Javascript AngularJS
28 votes368 views6 answers
Angular routing example
Javascript AngularJS
10 votes205 views2 answers
Angular http request query params
Javascript AngularJS
0 vote173 views1 answer
Sending value in input angular material
Javascript AngularJS
70 votes394 views6 answers
Create new project in angular
Javascript AngularJS
0 vote185 views1 answer
Angular submit with required
Javascript AngularJS