From fa5368d2b13cfdfd6cf68fa0b7922d81634a0218 Mon Sep 17 00:00:00 2001
From: smart94423 <smart94423@gmail.com>
Date: Fri, 18 Oct 2019 15:02:03 -0700
Subject: [PATCH] Add an extra check for an e.target.className.indexOf function

Imported fix from bvaughn/react-virtualized#1210
---
 src/vendor/detectElementResize.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/vendor/detectElementResize.js b/src/vendor/detectElementResize.js
index da3a0b2..5a0ec63 100644
--- a/src/vendor/detectElementResize.js
+++ b/src/vendor/detectElementResize.js
@@ -71,6 +71,8 @@ export default function createDetectElementResize(nonce) {
     var scrollListener = function(e) {
       // Don't measure (which forces) reflow for scrolls that happen inside of children!
       if (
+        e.target.className &&
+        typeof e.target.className.indexOf === 'function' &&
         e.target.className.indexOf('contract-trigger') < 0 &&
         e.target.className.indexOf('expand-trigger') < 0
       ) {