From 679a1a2985063d6e5f5eca13a8cda9be8cddf3da Mon Sep 17 00:00:00 2001
From: Grant Nestor <grantnestor@gmail.com>
Date: Mon, 9 Oct 2017 11:39:07 -0700
Subject: [PATCH] Normalize inputs before comparing in `item_in`

---
 notebook/static/tree/js/notebooklist.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/notebook/static/tree/js/notebooklist.js b/notebook/static/tree/js/notebooklist.js
index f9edf80fe..a821a0678 100644
--- a/notebook/static/tree/js/notebooklist.js
+++ b/notebook/static/tree/js/notebooklist.js
@@ -25,7 +25,11 @@ define([
     };
 
     var item_in = function(item, list) {
-      return list.indexOf(item) != -1;
+      // Normalize list and item to lowercase
+      var normalized_list = list.map(function(_item) {
+        return _item.toLowerCase();
+      });
+      return normalized_list.indexOf(item.toLowerCase()) != -1;
     };
 
     var includes_extension = function(filepath, extensionslist) {