Are there alternative methods, such as jQuery/ajax, to achieve a download progress bar without the "Save File" window?

To achieve a download progress bar without the "Save File" window, you can use jQuery/ajax to make an asynchronous request to the server to download the file. By tracking the progress of the download using the "progress" event, you can update a progress bar on the client-side to show the download progress.

<?php
// PHP code to handle the file download
$file = 'path/to/file.pdf';

header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="' . basename($file) . '"');
header('Content-Length: ' . filesize($file));

ob_clean();
flush();

readfile($file);
?>