当我单击页面时，“ beforeunload”事件仅在firefox中触发

Question

I open a new window using window.open()

And then I am trying to run some script(an ajax call) when user closes the opened window.

The open works fine,but the code doesn't work as expected in FF when I try to close the window

Here is my code

<?php

echo '<div id="iframecontainer"><iframe name="meeting-iframe" frameborder="0" style="width:80%;height:80%" src="' . $link . '"></iframe></div>';


?>
<script>
(function ($) {

  $(document).ready(function() {


    // Variables from php
    var event_id = '<?php echo $event_id; ?>';
    var user_id = '<?php echo $current_user->uid; ?>';
    //////////////////////////////////////////////////////////////////////
    // Run function before window is closed,doesn't work as expected in FF
    window.addEventListener("beforeunload", function (e) {

      var e = e || window.event;
      var message = 'Are you sure you want to leave the meeting?';


      if(e) {
        e.returnValue = message;
      }


     // Post to get meeting info
      $.post('/easymeet/getInfo/' + event_id).done(function(meetResponse) {
        //ajax callback ,I have hidden the code here as I don't think its relevent to the question

      });
    });

  });
}(jQuery))

I am loading an iframe inside my window and the page the iframe is fetching is all flash(just to point out).

I am testing in IE,chrome and Firefox Whats happening here is beforeunload is triggered and works well in IE and Chrome.

But in Firefox I manually have to click on the HTML or do some interaction. If I try to close the window without doing anything, the 'beforeunload' event doesn't seem to fire at all.

Answer 1

Firefox has some configurations that you can find writing "about:config" in the navigation toolbar. There you'll find some flags, including dom.require_user_interaction_for_beforeunload that makes 'beforeunload' event fires only when you click on the page. But you can't modify this configuration through code; You have to do this manually in Firefox.

PS: sorry for my english.