Disable specific dates in Elementor Pro Form - Date field (Flatpickr)

add_action( 'wp_footer', function () {
    if ( ! is_page('contact') ) return; // change 'contact' to your page slug or page ID

    ?>
    <script>
    (function($){
      //Dates to disable (ISO format: YYYY-MM-DD)
      const DISABLED_DATES = ["2025-09-10","2025-09-15","2025-12-25"];

      function applyDisable($scope){
        const $inputs = ($scope && $scope.find)
          ? $scope.find('.elementor-field-type-date input')
          : $('.elementor-field-type-date input');

        $inputs.each(function(){
          const input = this;

          (function waitForFP(tries){
            const fp = input._flatpickr;
            if (fp) {
              const existing = Array.isArray(fp.config.disable) ? fp.config.disable : [];
              fp.set('disable', existing.concat(DISABLED_DATES));

              fp.set('onClose', [
                function(selectedDates, dateStr) {
                  if (!dateStr) return;
                  const isDisabled = (fp.config.disable || []).some(rule => {
                    if (typeof rule === 'string') return rule === dateStr;
                    if (typeof rule === 'function') {
                      return rule(fp.parseDate(dateStr, 'Y-m-d'), '', fp) === false;
                    }
                    return false;
                  });
                  if (isDisabled) {
                    this.clear();
                    this.input.blur();
                    alert('That date is unavailable. Please choose another.');
                  }
                }
              ]);
              return;
            }
            if (tries <= 0) return;
            setTimeout(function(){ waitForFP(tries - 1); }, 100);
          })(30);
        });
      }

      $(function(){ applyDisable($(document)); });

      if (window.elementorFrontend && elementorFrontend.hooks) {
        elementorFrontend.hooks.addAction('frontend/element_ready/form.default', applyDisable);
      }

      $(document).on('elementor/popup/show', function(){ applyDisable($(document)); });

    })(jQuery);
    </script>
    <?php
});