primo commit

media/templates/site/cassiopeia/js/template.js

@@ -0,0 +1,56 @@
+/**
+ * @package     Joomla.Site
+ * @subpackage  Templates.Cassiopeia
+ * @copyright   (C) 2017 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ * @since       4.0.0
+ */
+
+Joomla = window.Joomla || {};
+((Joomla, document) => {
+
+  function initTemplate(event) {
+    const target = event && event.target ? event.target : document;
+
+    /**
+     * Prevent clicks on buttons within a disabled fieldset
+     */
+    target.querySelectorAll('fieldset.btn-group').forEach(fieldset => {
+      if (fieldset.getAttribute('disabled') === true) {
+        fieldset.style.pointerEvents = 'none';
+        fieldset.querySelectorAll('.btn').forEach(btn => btn.classList.add('disabled'));
+      }
+    });
+  }
+  document.addEventListener('DOMContentLoaded', event => {
+    initTemplate(event);
+
+    /**
+     * Back to top
+     */
+    const backToTop = document.getElementById('back-top');
+    function checkScrollPos() {
+      if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
+        backToTop.classList.add('visible');
+      } else {
+        backToTop.classList.remove('visible');
+      }
+    }
+    if (backToTop) {
+      checkScrollPos();
+      window.addEventListener('scroll', checkScrollPos);
+      backToTop.addEventListener('click', ev => {
+        ev.preventDefault();
+        window.scrollTo(0, 0);
+      });
+    }
+    document.head.querySelectorAll('link[rel="lazy-stylesheet"]').forEach($link => {
+      $link.rel = 'stylesheet';
+    });
+  });
+
+  /**
+   * Initialize when a part of the page was updated
+   */
+  document.addEventListener('joomla:updated', initTemplate);
+})(Joomla, document);