The powerful combination of AJAX and the onbeforeunload event

I am working with an aspx page that includes a javascript function

window.onbeforeunload = confirmExit;
function confirmExit()
{
return "You have tried to navigate away from this page. If you made changes without clicking Submit, they will be lost. Are you sure you want to leave?";

}   

While this function runs when the user leaves the page, it also triggers during partial page postbacks. How can I determine if it's a partial page postback and disregard it?

Answer №1

Is it Possible to Stop window.onbeforeunload Trigger during AJAX Call?

Check if the action you are performing falls into any of these categories:

onbeforeunload event

In order to trigger this event, you can do any of the following:

  • Close the current window.
  • Navigate to a new address by inputting a new URL or selecting from your Favorites.
  • Click on a link that directs to another webpage.
  • Use the anchor.click method.
  • Utilize the document.write method.
  • Invoke the document.close method.
  • Trigger the window.close method.
  • Use either the window.navigate or NavigateAndFind method.
  • Perform a location.replace.
  • Perform a location.reload.
  • Update the location.href property with a new URL.
  • Submit a form to the address specified in the ACTION attribute via the INPUT type=submit control, or invoke the form.submit method.
  • Open a new window using window.open, specifying _self for the window name.
  • Use the document.open method.
  • Click on the Back, Forward, Refresh, or Home button on the browser.

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