Learn how to trigger an event or API call in Angular 8 when the browser is closed with the help of HostListener

I am facing the challenge of calling a simple websocket closure API when the browser is closed in my project. I attempted to utilize HostListener, but unfortunately it did not work as expected. You can find the code snippet below: https://stackblitz.com/edit/angular-nm7uww

app.component.html

<hello name="{{ name }}"></hello>
<p>
  Start editing to see some magic happen :)
</p>

app.component.ts

import { HostListener,Component,OnInit  } from '@angular/core';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent  {
  name = 'Angular';
ngOnInit() {
      @c('window:beforeunlosd', ['$event'])
    beforeunloadHandler(event){

    }
  }
}

Answer №1

The formatting is incorrect, try this:

  @HostListener("window:beforeunload", ["$event"])
  beforeunloadHandler(event) {
    console.log("closing");
    // add the rest of your code here
  }

A method cannot be declared within another method.

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