https://chanteloup-les-vignes.fr/modules/contrib/webform/js/webform.form.submit_once.js?tm9u9n

1/**
2 * @file
3 * JavaScript behaviors for preventing duplicate webform submissions.
4 */
5
6(function ($, Drupal, once) {
7  /**
8   * Submit once.
9   *
10   * @type {Drupal~behavior}
11   *
12   * @prop {Drupal~behaviorAttach} attach
13   *   Attaches the behavior for preventing duplicate webform submissions.
14   */
15  Drupal.behaviors.webformSubmitOnce = {
16    clear: function () {
17      var $form = $('.js-webform-submit-once');
18      $form.removeData('webform-submitted');
19      $form.find('.js-webform-wizard-pages-links :submit, .form-actions :submit').removeClass('is-disabled');
20      $form.find('.form-actions .ajax-progress.ajax-progress-throbber').remove();
21    },
22    attach(context) {
23      $(once('webform-submit-once', '.js-webform-submit-once', context)).each(function () {
24        var $form = $(this);
25        // Remove data-webform-submitted.
26        $form.removeData('webform-submitted');
27        // Remove .js-webform-submit-clicked.
28        $form.find('.js-webform-wizard-pages-links :submit, .form-actions :submit').removeClass('js-webform-submit-clicked');
29
30        // Track which submit button was clicked.
31        // @see http://stackoverflow.com/questions/5721724/jquery-how-to-get-which-button-was-clicked-upon-form-submission
32        $form.find('.js-webform-wizard-pages-links :submit, .form-actions :submit').on('click', function () {
33          $form.find('.js-webform-wizard-pages-links :submit, .form-actions :submit')
34            .removeClass('js-webform-submit-clicked');
35          $(this)
36            .addClass('js-webform-submit-clicked');
37        });
38
39        $(this).on('submit', function () {
40          // Find clicked button
41          var $clickedButton = $form.find('.js-webform-wizard-pages-links :submit.js-webform-submit-clicked, .form-actions :submit.js-webform-submit-clicked');
42
43          // Don't submit if client-side validation has failed.
44          if (!$clickedButton.attr('formnovalidate') && (typeof jQuery.fn.valid === 'function') && !($form.valid())) {
45            return false;
46          }
47
48          // Track webform submitted.
49          if ($form.data('webform-submitted')) {
50            return false;
51          }
52          $form.data('webform-submitted', 'true');
53
54          // Visually disable all submit buttons.
55          // Submit buttons can't disabled because their op(eration) must to be posted back to the server.
56          $form.find('.js-webform-wizard-pages-links :submit, .form-actions :submit').addClass('is-disabled');
57
58          // Set the throbber progress indicator.
59          $clickedButton.after(Drupal.theme.ajaxProgressThrobber());
60        });
61      });
62    }
63  };
64
65})(jQuery, Drupal, once);