70 lines
1.7 KiB
JavaScript
70 lines
1.7 KiB
JavaScript
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/**
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* @file
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* Provides date format preview feature.
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*/
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(function ($, Drupal, drupalSettings) {
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const dateFormats = drupalSettings.dateFormats;
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/**
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* Display the preview for date format entered.
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*
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* @type {Drupal~behavior}
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*
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* @prop {Drupal~behaviorAttach} attach
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* Attach behavior for previewing date formats on input elements.
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*/
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Drupal.behaviors.dateFormat = {
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attach(context) {
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const source = once(
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'dateFormat',
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'[data-drupal-date-formatter="source"]',
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context,
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);
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const target = once(
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'dateFormat',
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'[data-drupal-date-formatter="preview"]',
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context,
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);
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// All elements have to exist.
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if (!source.length || !target.length) {
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return;
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}
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/**
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* Event handler that replaces date characters with value.
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*
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* @param {jQuery.Event} e
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* The jQuery event triggered.
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*/
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function dateFormatHandler(e) {
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const baseValue = e.target.value || '';
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const dateString = baseValue.replace(/\\?(.?)/gi, (key, value) =>
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dateFormats[key] ? dateFormats[key] : value,
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);
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// Set date preview.
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target.forEach((item) => {
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item.querySelectorAll('em').forEach((em) => {
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em.textContent = dateString;
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});
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});
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$(target).toggleClass('js-hide', !dateString.length);
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}
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/**
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* On given event triggers the date character replacement.
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*/
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$(source)
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.on(
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'keyup.dateFormat change.dateFormat input.dateFormat',
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dateFormatHandler,
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)
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// Initialize preview.
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.trigger('keyup');
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},
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};
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})(jQuery, Drupal, drupalSettings);
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