From c8239193a1c048bb91d2d744a59a1d1ee3ac4b96 Mon Sep 17 00:00:00 2001
From: Marius Olbertz <marius.olbertz@gmail.com>
Date: Thu, 12 Jan 2017 08:11:26 +0100
Subject: [PATCH] Prevent keyboard trap in drilldown menu.

Added check if current element is first/last element in root ul of drilldown.
Only prevents default if this is not the case now.

Fixes #9597
---
 js/foundation.drilldown.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/js/foundation.drilldown.js b/js/foundation.drilldown.js
index 3b7802d69..53673bcca 100644
--- a/js/foundation.drilldown.js
+++ b/js/foundation.drilldown.js
@@ -227,11 +227,13 @@ class Drilldown {
         },
         up: function() {
           $prevElement.focus();
-          return true;
+          // Don't tap focus on first element in root ul
+          return !$element.is(_this.$element.find('> li:first-child > a'));
         },
         down: function() {
           $nextElement.focus();
-          return true;
+          // Don't tap focus on last element in root ul
+          return !$element.is(_this.$element.find('> li:last-child > a'));
         },
         close: function() {
           _this._back();
-- 
2.47.2