listen-custom-event.ts

import { Component, ChangeDetectionStrategy, Input, ElementRef } from '@angular/core';
 
@Component({
  selector: 'app-calendar',
  template: `
    <app-events (chooseEvent)="chooseEvent($event.detail)"></app-events>
  `,
  changeDetection: ChangeDetectionStrategy.OnPush
})
export class CalendarComponent {
  public chooseEvent(event: CelebrationEvent): void { ... }
}