user logout when browser tab is closed

I need help. "How can I log out a user in Angular when they close the browser tab instead of clicking the logout button, so that the next time they try to access the application, they have to log in again?"

Answer

If you are storing login details/Authenticating by session in browser:

To destroy a session when a browser tab is closed in an Angular application using TypeScript, the beforeunload event can be used. This event is triggered right before the page is unloaded, giving an opportunity to execute code for session cleanup.

import { HostListener, Injectable } from '@angular/core';
import { Router } from '@angular/router';

@Injectable({
  providedIn: 'root',
})
export class SessionService {
  constructor(private router: Router) {}

  @HostListener('window:beforeunload', ['$event'])
  beforeUnloadHandler(event: BeforeUnloadEvent) {
    this.destroySession();
  }

  destroySession() {
     localStorage.removeItem('yourSessionKey');
     this.router.navigate(['/login']);
  }
}

This service listens for the beforeunload event and calls the destroySession method. The destroySession method then removes the session data from local storage and redirects the user to the login page.

It is important to note that relying solely on client-side events for session management might not be completely reliable, as the beforeunload event is not always guaranteed to execute. For enhanced security, it is recommended to implement server-side session management with appropriate timeouts.