/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

1 vote264 views1 answer
Angular contains both .browserslistrc and browserslist
Javascript AngularJS
8 votes244 views4 answers
Angular moment
Javascript AngularJS
0 vote223 views1 answer
Angular decode url
Javascript AngularJS
1 vote233 views1 answer
Angular remove item from localstorage
Javascript AngularJS
0 vote255 views1 answer
Best way to filter table in angular
Javascript AngularJS
0 vote203 views1 answer
Install bootstrap in angular 9 stack overflow
Javascript AngularJS
0 vote229 views1 answer
No provider service angular
Javascript AngularJS
0 vote228 views1 answer
How to disable reactive form submit button in Angular
Javascript AngularJS
0 vote244 views2 answers
Accept 2 values after decimal in angular forms
Javascript AngularJS
4 votes240 views3 answers
In angular how to get router url without query params
Javascript AngularJS