Fixed an issue #11853 - window.opera=null problem (#11854)

facebook · Dec 19, 2017 · faa4218 · faa4218
1 parent 247c524
commit faa4218
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/packages/react-dom/src/events/BeforeInputEventPlugin.js b/packages/react-dom/src/events/BeforeInputEventPlugin.js
@@ -49,6 +49,7 @@ const useFallbackCompositionData =
 function isPresto() {
   const opera = window.opera;
   return (
+    opera !== null &&
     typeof opera === 'object' &&
     typeof opera.version === 'function' &&
     parseInt(opera.version(), 10) <= 12