From b8770ba98bf5e077a81b8f543a045580088a548e Mon Sep 17 00:00:00 2001
From: Phil Hughes <me@iamphill.com>
Date: Mon, 31 Jul 2017 11:23:19 +0100
Subject: [PATCH] fixed karma failure

---
 app/assets/javascripts/lib/utils/sticky.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/assets/javascripts/lib/utils/sticky.js b/app/assets/javascripts/lib/utils/sticky.js
index b5fde040a17..43a808b6ab3 100644
--- a/app/assets/javascripts/lib/utils/sticky.js
+++ b/app/assets/javascripts/lib/utils/sticky.js
@@ -9,6 +9,8 @@ export const isSticky = (el, scrollY, stickyTop) => {
 };
 
 export default (el) => {
+  if (!el) return;
+
   const computedStyle = window.getComputedStyle(el);
 
   if (!/sticky/.test(computedStyle.position)) return;