/**
 * @snippet       Product Category Search Box
 * @how-to        Get free snippets at ostadno.com
 * @author        Masoud Aroodipoor
 */
function custom_admin_product_category_search_box() {
    $screen = get_current_screen();
    if ( $screen && $screen->post_type === 'product' ) {
        ?>
        
        
            document.addEventListener('DOMContentLoaded', function () {
                const categoryBox = document.querySelector('#product_cat-all');
                if (!categoryBox) return;
                const searchInput = document.createElement('input');
                searchInput.type = 'text';
                searchInput.placeholder = 'جستجو...';
                searchInput.style.width = '100%';
                searchInput.style.marginBottom = '8px';
                categoryBox.prepend(searchInput);
                searchInput.addEventListener('input', function () {
                    const filter = this.value.toLowerCase();
                    const items = categoryBox.querySelectorAll('li');
                    items.forEach(function (item) {
                        const label = item.textContent.toLowerCase();
                        item.style.display = label.includes(filter) ? '' : 'none';
                    });
                });
            });