onBeforeUnload doesn't call methods, browser closes too fast?

问题

I'm trying to call a method in the beforeunload event handler. It seems like the browser is closing too fast. Here is my code:

@HostListener('window:beforeunload', ['$event'])
  onBeforeUnload(): boolean {

    let logout: any;
    logout = logout();
    while (logout = false) {
      console.log("session not ended")
    }
    return true;

  }

  public async logout(): Promise<boolean> {
    this.userSessionService.EndSession(this.userSessionId);
    this.oauthService.logOut(false);
    return true;
  }

What I want to happen is when a user closes the browser, the logout method is called so that my database is updated.

来源：https://stackoverflow.com/questions/62030052/onbeforeunload-doesnt-call-methods-browser-closes-too-fast