https://dayan.org/modules/contrib/webform/js/webform.behaviors.js?tjarg2

1/**
2 * @file
3 * Webform behaviors.
4 */
5
6(function ($, Drupal) {
7
8  // Trigger Drupal's attaching of behaviors after the page is
9  // completely loaded.
10  // @see https://stackoverflow.com/questions/37838430/detect-if-page-is-load-from-back-button
11  // @see https://stackoverflow.com/questions/20899274/how-to-refresh-page-on-back-button-click/20899422#20899422
12  var isChrome = (/chrom(e|ium)/.test(window.navigator.userAgent.toLowerCase()));
13  if (isChrome) {
14    // Track back button in navigation.
15    // @see https://stackoverflow.com/questions/37838430/detect-if-page-is-load-from-back-button
16    var backButton = false;
17    if (window.performance) {
18      var navEntries = window.performance.getEntriesByType('navigation');
19      if (navEntries.length > 0 && navEntries[0].type === 'back_forward') {
20        backButton = true;
21      }
22      else if (window.performance.navigation
23        && window.performance.navigation.type === window.performance.navigation.TYPE_BACK_FORWARD) {
24        backButton = true;
25      }
26    }
27
28    // If the back button is pressed, delay Drupal's attaching of behaviors.
29    if (backButton) {
30      var attachBehaviors = Drupal.attachBehaviors;
31      Drupal.attachBehaviors = function (context, settings) {
32        setTimeout(function () {
33          attachBehaviors(context, settings);
34        }, 300);
35      };
36    }
37  }
38
39})(jQuery, Drupal);