diff --git a/build/media/com_newsfeeds/js/categories-default.js b/build/media/com_newsfeeds/js/categories-default.js
deleted file mode 100644
index 1c09270d0219a..0000000000000
--- a/build/media/com_newsfeeds/js/categories-default.js
+++ /dev/null
@@ -1,43 +0,0 @@
-/**
- * @copyright  Copyright (C) 2005 - 2018 Open Source Matters, Inc. All rights reserved.
- * @license    GNU General Public License version 2 or later; see LICENSE.txt
- */
-(function (JText) {
-  'use strict';
-
-  // Selectors used by this script
-  var buttonsSelector = '[id^=category-btn-]';
-
-  /**
-   * Handle the category toggle button click event
-   * @param event
-   */
-  var handleCategoryToggleButtonClick = function (event) {
-    var button = event.currentTarget;
-    var icon = button.querySelector('span');
-
-    // Toggle icon class
-    icon.classList.toggle('icon-plus');
-    icon.classList.toggle('icon-minus');
-
-    // Toggle aria label
-    var ariaLabel = button.getAttribute('aria-label');
-    button.setAttribute('aria-label', (
-      ariaLabel === JText._('JGLOBAL_EXPAND_CATEGORIES') ? JText._('JGLOBAL_COLLAPSE_CATEGORIES') : JText._('JGLOBAL_EXPAND_CATEGORIES')
-    ));
-  };
-
-  /**
-   * Register the events
-   */
-  var registerEvents = function () {
-    var buttons = [].slice.call(document.querySelectorAll(buttonsSelector));
-    buttons.forEach(function (button) {
-      button.addEventListener('click', handleCategoryToggleButtonClick);
-    });
-  };
-
-  document.addEventListener('DOMContentLoaded', function () {
-    registerEvents();
-  });
-})(Joomla.JText);
diff --git a/build/media_src/com_newsfeeds/js/categories-default.es6.js b/build/media_src/com_newsfeeds/js/categories-default.es6.js
new file mode 100644
index 0000000000000..72ad0a83dbeb0
--- /dev/null
+++ b/build/media_src/com_newsfeeds/js/categories-default.es6.js
@@ -0,0 +1,46 @@
+/**
+ * @copyright  Copyright (C) 2005 - 2018 Open Source Matters, Inc. All rights reserved.
+ * @license    GNU General Public License version 2 or later; see LICENSE.txt
+ */
+((JText) => {
+  'use strict';
+
+  // Selectors used by this script
+  const buttonsSelector = '[id^=category-btn-]';
+
+  /**
+   * Handle the category toggle button click event
+   * @param event
+   */
+  const handleCategoryToggleButtonClick = (event) => {
+    const button = event.currentTarget;
+    const icon = button.querySelector('span');
+
+    // Toggle icon class
+    icon.classList.toggle('icon-plus');
+    icon.classList.toggle('icon-minus');
+
+    // Toggle aria label
+    const ariaLabel = button.getAttribute('aria-label');
+    button.setAttribute(
+      'aria-label',
+      (ariaLabel === JText._('JGLOBAL_COLLAPSE_CATEGORIES')
+        || JText._('JGLOBAL_EXPAND_CATEGORIES')),
+    );
+  };
+
+  /**
+   * Register the events
+   */
+  const registerEvents = () => {
+    const buttons = [].slice.call(document.querySelectorAll(buttonsSelector));
+    buttons.forEach((button) => {
+      button.addEventListener('click', handleCategoryToggleButtonClick);
+    });
+
+    // Cleanup
+    document.removeEventListener('DOMContentLoaded', registerEvents);
+  };
+
+  document.addEventListener('DOMContentLoaded', registerEvents);
+})(Joomla.JText);