3 * Provides date format preview feature.
6 (function ($, Drupal, drupalSettings) {
10 var dateFormats = drupalSettings.dateFormats;
13 * Display the preview for date format entered.
15 * @type {Drupal~behavior}
17 * @prop {Drupal~behaviorAttach} attach
18 * Attach behavior for previewing date formats on input elements.
20 Drupal.behaviors.dateFormat = {
21 attach: function (context) {
22 var $context = $(context);
23 var $source = $context.find('[data-drupal-date-formatter="source"]').once('dateFormat');
24 var $target = $context.find('[data-drupal-date-formatter="preview"]').once('dateFormat');
25 var $preview = $target.find('em');
27 // All elements have to exist.
28 if (!$source.length || !$target.length) {
33 * Event handler that replaces date characters with value.
35 * @param {jQuery.Event} e
36 * The jQuery event triggered.
38 function dateFormatHandler(e) {
39 var baseValue = $(e.target).val() || '';
40 var dateString = baseValue.replace(/\\?(.?)/gi, function (key, value) {
41 return dateFormats[key] ? dateFormats[key] : value;
44 $preview.html(dateString);
45 $target.toggleClass('js-hide', !dateString.length);
49 * On given event triggers the date character replacement.
51 $source.on('keyup.dateFormat change.dateFormat input.dateFormat', dateFormatHandler)
52 // Initialize preview.
57 })(jQuery, Drupal, drupalSettings);