An error occurred: @Output not initialized

I'm working on an angular app for managers to keep track of their teams, and I'm stuck with an @Output error :

An error occurred: @Output deleteMeeting not initialized in 'MeetingItemComponent'.

I have a Meetings component, generating a list of MeetingItem components. I want to perform actions when the user clicks on different buttons (edit, delete, show details).

Here is my parent Meetings template :

<div class="meeting__list" [@newMeeting]="meetings.length">
  <app-meeting-item
    *ngFor="let meeting of meetings"
    [meeting]="meeting"
    (deleteMeeting)="deleteMeeting($event)"
    (openMeetingDialog)="openMeetingDialog($event)"
    (messageClick)="openMessage($event)"
  ></app-meeting-item>
</div>

My MeetingItem template (only the part concerned by this post) :

<span class="meeting__actions">
    <mat-icon *ngIf="meeting.message" (click)="onMessageClick(meeting)" matTooltip="Read the message"
      matTooltipPosition="above" class="icon--notes">notes</mat-icon>
    <mat-icon (click)="onOpenMeetingDialog(meeting)" matTooltip="Edit this meeting" matTooltipPosition="above" class="icon--edit">edit</mat-icon>
    <mat-icon (click)="onDeleteMeeting(meeting.id)" matTooltip="Delete this meeting" matTooltipPosition="above" class="icon--delete">delete_outline</mat-icon>
  </span>

My MeetingItem component :

import { Component, Input, Output } from '@angular/core';
import { EventEmitter } from 'events';

@Component({
  selector: 'app-meeting-item',
  templateUrl: './meeting-item.component.html',
  styleUrls: ['./meeting-item.component.scss']
})
export class MeetingItemComponent {

  @Input() meeting;

  @Output() deleteMeeting = new EventEmitter();
  @Output() openMeetingDialog = new EventEmitter();
  @Output() messageClick = new EventEmitter();

  constructor() {}

  onDeleteMeeting(meetingId) {
    this.deleteMeeting.emit(meetingId);
  }

  onOpenMeetingDialog(meeting) {
    this.openMeetingDialog.emit(meeting);
  }

  onMessageClick(meeting) {
    this.messageClick.emit(meeting);
  }
}

To make your code work in a stackblitz, I had to replace

import { EventEmitter } from 'events';

with

import { EventEmitter } from '@angular/core';

Had the same error,

Import was correct like

import { EventEmitter } from '@angular/core';

But the variable definition was wrong:

@Output() onFormChange: EventEmitter<any>;

Should be:

@Output() onFormChange: EventEmitter<any> = new EventEmitter();

I had also the same error. I found that Auto Import extension of VS Code did this. import * as EventEmitter from 'events'; is imported instead of import { EventEmitter } from '@angular/core';

So make sure if the import is ok or not.

In your component just use core angular module. Simply put this code at beginning of file.

import { EventEmitter } from '@angular/core'; 

I had the same problem even importing from @angular/core.

The problem: I was initializing the EventEmmitter object in the ngOnInit method from my component class. Solution: I moved the initialization to the component's class constructor.

change the import : import { EventEmitter } from 'events'; with : import { EventEmitter } from '@angular/core';

For me it works if I change below imports import { EventEmitter } from 'events';

to

import { Component, Output ,EventEmitter} from '@angular/core';

@Output() isAbout: EventEmitter<boolean> = new EventEmitter(); This should be the whole syntax to make it work you need the instance of the event emitter