javascript - JS event handlers behaviours different in incognito mode

Question

I have a class which should save some datas when browser is about to close:

class Foo {
  session;

  init() {
    window.addEventListener('unload', this.saveSession.bind(this));
    this.session = {};
  }

  public saveSession() {
    console.log(this.session);  
  }
}      

Now, for some reason, the session property saved by the event handler is always the empty object, no matter what change I apply to it (new props to the same obj, a whole new object etc).

The weird thing is: it works in localhost, it works in test machine in incognito mode, it doesn't work in test machine in normal mode.

How is this possible?

question from:https://stackoverflow.com/questions/65850145/js-event-handlers-behaviours-different-in-incognito-mode

Answer 1

Waitting for answers