Update modal.js

This change allows catching the element with the handler attached, rather than target any other child element.

Author: gazpachu

docs/js/modal.js

@@ -16,7 +16,7 @@ let visibleModal = null;
 // Toggle modal
 const toggleModal = event => {
   event.preventDefault();
-  const modal = document.getElementById(event.target.getAttribute('data-target'));
+  const modal = document.getElementById(event.currentTarget.getAttribute('data-target'));
   (typeof(modal) != 'undefined' && modal != null)
     && isModalOpen(modal) ? closeModal(modal) : openModal(modal)
 }
@@ -92,4 +92,4 @@ const getScrollbarWidth = () => {
 // Is scrollbar visible
 const isScrollbarVisible = () => {
   return document.body.scrollHeight > screen.height;
-}
+}