make a fork for ReactCurrentDispatcher (#14588)

Author: Sunil Pai

packages/react/src/forks/ReactCurrentDispatcher.www.js

@@ -0,0 +1,8 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+exportdefaultrequire('ReactCurrentDispatcher');

scripts/rollup/forks.js

@@ -218,6 +218,19 @@ const forks = Object.freeze({
 }
 },
 
+// Similarly, we preserve an inline require to ReactCurrentDispatcher.
+// See the explanation in FB version of ReactCurrentDispatcher in www:
+'react/src/ReactCurrentDispatcher': (bundleType,entry)=>{
+switch(bundleType){
+caseFB_WWW_DEV:
+caseFB_WWW_PROD:
+caseFB_WWW_PROFILING:
+return'react/src/forks/ReactCurrentDispatcher.www.js';
+default:
+returnnull;
+}
+},
+
 // Different wrapping/reporting for caught errors.
 'shared/invokeGuardedCallbackImpl': (bundleType,entry)=>{
 switch(bundleType){