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iadmin/themes/new-theme/js/components/form/text-with-length-counter.js

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+/**
+ * Copyright since 2007 PrestaShop SA and Contributors
+ * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Open Software License (OSL 3.0)
+ * that is bundled with this package in the file LICENSE.md.
+ * It is also available through the world-wide-web at this URL:
+ * https://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@prestashop.com so we can send you a copy immediately.
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
+ * versions in the future. If you wish to customize PrestaShop for your
+ * needs please refer to https://devdocs.prestashop.com/ for more information.
+ *
+ * @author    PrestaShop SA and Contributors <contact@prestashop.com>
+ * @copyright Since 2007 PrestaShop SA and Contributors
+ * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ */
+
+const {$} = window;
+
+/**
+ * TextWithLengthCounter handles input with length counter UI.
+ *
+ * Usage:
+ *
+ * There must be an element that wraps both input & counter display with ".js-text-with-length-counter" class.
+ * Counter display must have ".js-countable-text-display" class and input must have ".js-countable-text-input" class.
+ * Text input must have "data-max-length" attribute.
+ *
+ * <div class="js-text-with-length-counter">
+ *  <span class="js-countable-text"></span>
+ *  <input class="js-countable-input" data-max-length="255">
+ * </div>
+ *
+ * In Javascript you must enable this component:
+ *
+ * new TextWithLengthCounter();
+ */
+export default class TextWithLengthCounter {
+  constructor() {
+    this.wrapperSelector = '.js-text-with-length-counter';
+    this.textSelector = '.js-countable-text';
+    this.inputSelector = '.js-countable-input';
+
+    $(document).on('input', `${this.wrapperSelector} ${this.inputSelector}`, (e) => {
+      const $input = $(e.currentTarget);
+      const remainingLength = $input.data('max-length') - $input.val().length;
+
+      $input.closest(this.wrapperSelector).find(this.textSelector).text(remainingLength);
+    });
+  }
+}