Add an extra check for an e.target.className.indexOf function

Imported fix from bvaughn/react-virtualized#1210
soren121 · Oct 18, 2019 · fe5994e · fe5994e
1 parent ffcba2d
commit fe5994e
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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
       ) {