Removing TOC "Confirm Navigation" pop-up

I managed to do this with a JS in the header:

    // Script to automatically click "Go Back" in the error dialog
    (function() {
        function closeErrorDialog() {
            var dialog = document.querySelector('.PageErrorDialog.TOC');
            var goBackButton = dialog ? dialog.querySelector('.ErrorButtons button:first-child') : null;

            if (dialog && goBackButton) {
                goBackButton.click();
            }
        }

        setInterval(closeErrorDialog, 500); // Check every 500 milliseconds
    })();

Note that setting a very short interval can increase the load on the browser, as it will be running the check more frequently.

Thank you for your response. But my client has specifically asked for "Back" button on all the pages. The only thing I want to hide right now is "Confirm navigation" pop-up. Is there any way I can hide it?