Steps to avoid IE11 prompt (Do you really want to leave this site)

In the midst of making a webpage, I find myself faced with the peculiar issue of only having a dropdown to select. To make matters worse, when attempting to navigate to the next page in IE11, a pesky message pops up. Curious about the default behavior of this pop up in IE11 (as it doesn't seem to occur in Chrome or Firefox), I am seeking ways to prevent its appearance.

Answer №1

An important question that needs to be addressed is: "What is causing the alert to appear in IE11?".

Is the issue related to navigating from a secure page to an insecure one? Ensure that you are correctly calling the secure booking API or allowing the browser to determine the protocol by not explicitly stating it:

var url = '//api.booking_site.url/api_endpoint';

By using this method, the URL will adapt to the security settings of the current browsing environment.

To simply remove the pop-up alert, assuming it is triggered by an alert box, you can override the alert function:

window.alert = function() { return true; }

Answer №2

It appears that the issue is stemming from the return value of onbeforeunload. It seems that instead of returning null, you should simply return nothing.

For more information, check out this thread on IE's onBeforeUnload handler showing null

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