Find all needed information about Onbeforeunload Support. Below you can see links where you can find everything you want to know about Onbeforeunload Support.
https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onbeforeunload
The onbeforeunload property of the WindowEventHandlers mixin is the EventHandler for processing beforeunload events. These events fire when a window is about to unload its resources. At this point, the document is still visible and the event is still cancelable.
https://developer.mozilla.org/en-US/docs/Web/API/Window/beforeunload_event
onbeforeunload: This event enables a web page to trigger a confirmation dialog asking the user if they really want to leave the page. If the user confirms, the browser navigates to the new page, otherwise it cancels the navigation. ... However note that not all browsers support this method, and some instead require the event handler to ...
https://www.w3schools.com/jsref/event_onbeforeunload.asp
The onbeforeunload event occurs when the document is about to be unloaded. This event allows you to display a message in a confirmation dialog box to inform the user whether he/she wants to stay or leave the current page. The default message that appears in …
http://help.dottoro.com/ljhtbtum.php
The onbeforeunload event is not cancelable, because of security reasons, but if an event handler function for the onbeforeunload event returns a string value, this text will be shown in a confirmation dialog box, where the user can confirm whether he wants to stay or leave the current page. ... Browser support: Occurs before the browser unloads ...
https://support.mozilla.org/en-US/questions/993963
Problem statement is want to execute piece of code only on browser close , refreshing the browser tab , tab close . Previous version of firefox used to execute the code in window.onbeforeunload in all the 3 events mentioned above but now code in window.onbeforeunload is not executing on …
https://bugzilla.mozilla.org/show_bug.cgi?id=245809
If you check the MSDN document about onbeforeunload, you will notice IE does not support window.attachEvent('onbeforeunload', fct). So maybe the real question is: should Mozilla support addEventListener("beforeunload", ...) at all? Since there is no way for an event listener to return a string it just doesn't make much sense.
https://www.w3schools.com/Tags/ev_onbeforeunload.asp
The onbeforeunload event fires when the document is about to be unloaded. This event allows you to display a message in a confirmation dialog box to inform the user whether he/she wants to stay or leave the current page. The default message that appears in …
https://support.microsoft.com/en-us/help/946214/an-html-application-that-uses-the-onbeforeunload-event-closes-unexpect
Sep 22, 2011 · An HTML application that uses the "onbeforeunload" event closes unexpectedly in Internet Explorer 7 when you click "Cancel" ... The HTA uses the onbeforeunload event. You start the HTA in Windows Internet Explorer 7. When you close the HTA, you receive a message that resembles the following: ... Your feedback will help us improve the support ...
https://github.com/jasonzissman/TimeMe.js/issues/28
Jan 05, 2017 · Hello, I have tested to send a time to database with AJAX script with the event onbeforeunload and it seems to not working. Someone has the same issue ? I tried with onunload and it seems to work, any problem to use this function instead...
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