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

Imported fix from bvaughn/react-virtualized#1210
soren121 · Oct 18, 2019 · 3637c19 · 3637c19
1 parent ffcba2d
commit 3637c19
Showing 1 changed file with 8 additions and 6 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
       ) {
@@ -99,7 +101,7 @@ export default function createDetectElementResize(nonce) {
       animationstartevent = 'animationstart',
       domPrefixes = 'Webkit Moz O ms'.split(' '),
       startEvents = 'webkitAnimationStart animationstart oAnimationStart MSAnimationStart'.split(
-        ' ',
+        ' '
       ),
       pfx = '';
     {
@@ -186,15 +188,15 @@ export default function createDetectElementResize(nonce) {
         /* Listen for a css animation to detect element display/re-attach */
         if (animationstartevent) {
           element.__resizeTriggers__.__animationListener__ = function animationListener(
-            e,
+            e
           ) {
             if (e.animationName == animationName) {
               resetTriggers(element);
             }
           };
           element.__resizeTriggers__.addEventListener(
             animationstartevent,
-            element.__resizeTriggers__.__animationListener__,
+            element.__resizeTriggers__.__animationListener__
           );
         }
       }
@@ -208,20 +210,20 @@ export default function createDetectElementResize(nonce) {
     } else {
       element.__resizeListeners__.splice(
         element.__resizeListeners__.indexOf(fn),
-        1,
+        1
       );
       if (!element.__resizeListeners__.length) {
         element.removeEventListener('scroll', scrollListener, true);
         if (element.__resizeTriggers__.__animationListener__) {
           element.__resizeTriggers__.removeEventListener(
             animationstartevent,
-            element.__resizeTriggers__.__animationListener__,
+            element.__resizeTriggers__.__animationListener__
           );
           element.__resizeTriggers__.__animationListener__ = null;
         }
         try {
           element.__resizeTriggers__ = !element.removeChild(
-            element.__resizeTriggers__,
+            element.__resizeTriggers__
           );
         } catch (e) {
           // Preact compat; see developit/preact-compat/issues/228