more check

facebook · Feb 26, 2021 · 42adb80 · 42adb80
1 parent 68238cc
commit 42adb80
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/react-dom/src/client/getActiveElement.js b/packages/react-dom/src/client/getActiveElement.js
@@ -9,7 +9,7 @@
 
 export default function getActiveElement(doc: ?Document): ?Element {
   doc = doc || (typeof document !== 'undefined' ? document : undefined);
-  if (typeof doc === 'undefined') {
+  if (typeof doc === 'undefined' || doc === null) {
     return null;
   }
   try {