Force downloadable checkbox to be checked on the vendor product editor

/**

 * Force downloadable checkbox to be checked using MutationObserver

 */

function force_downloadable_checkbox_checked() {

    ?>

    <script type="text/javascript">

    (function() {

        // Function to check the downloadable checkbox

        function checkDownloadable() {

            var downloadableCheckbox = document.getElementById('_downloadable');

            if (downloadableCheckbox && !downloadableCheckbox.checked) {

                downloadableCheckbox.checked = true;

                console.log('Downloadable checkbox has been checked');

                // Create and dispatch a change event

                var event = new Event('change', { bubbles: true });

                downloadableCheckbox.dispatchEvent(event);

            }

        }

        // Set up a MutationObserver to watch for DOM changes

        var observer = new MutationObserver(function(mutations) {

            checkDownloadable();

        });

        // Start observing the document with the configured parameters

        observer.observe(document.body, { 

            childList: true,

            subtree: true

        });

        // Also check on initial load

        document.addEventListener('DOMContentLoaded', function() {

            checkDownloadable();

            // And check again after a delay to catch late-loading elements

            setTimeout(checkDownloadable, 1000);

            setTimeout(checkDownloadable, 2000);

            setTimeout(checkDownloadable, 3000);

        });

        // Also check when the window loads fully

        window.addEventListener('load', function() {

            checkDownloadable();

            setTimeout(checkDownloadable, 500);

        });

        // If jQuery is available, also set up some jQuery-specific handlers

        if (typeof jQuery !== 'undefined') {

            jQuery(document).ready(function($) {

                checkDownloadable();

                // When product type changes

                $(document).on('change', '#product-type', function() {

                    setTimeout(checkDownloadable, 100);

                });

                // After Ajax calls

                $(document).ajaxComplete(function() {

                    setTimeout(checkDownloadable, 100);

                });

            });

        }

    })();

    </script>

    <?php

}

// Add to both wp_footer and admin_footer to cover all bases

add_action('wp_footer', 'force_downloadable_checkbox_checked', 99);

add_action('admin_footer', 'force_downloadable_checkbox_checked', 99);