From f1c26c2bf6bf02b1f820c61c28b49e8d8bac5980 Mon Sep 17 00:00:00 2001
From: Brian Vaughn <bvaughn@fb.com>
Date: Wed, 6 Feb 2019 15:32:27 +0000
Subject: [PATCH] Added possible backwards compatibility fix for
 ReactCurrentDispatcher with older react package versions

---
 packages/shared/ReactSharedInternals.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/packages/shared/ReactSharedInternals.js b/packages/shared/ReactSharedInternals.js
index d8aea57f6bb3a..40f2a53f8539e 100644
--- a/packages/shared/ReactSharedInternals.js
+++ b/packages/shared/ReactSharedInternals.js
@@ -10,4 +10,19 @@ import React from 'react';
 const ReactSharedInternals =
   React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;
 
+// Add fallabck for older React versions.
+// Current owner and dispatcher used to share the same ref.
+// PR #14548 split them out to better support "react-debug-tools".
+if (!ReactSharedInternals.hasOwnProperty('ReactCurrentDispatcher')) {
+  const {ReactCurrentOwner} = ReactSharedInternals;
+  ReactSharedInternals.ReactCurrentDispatcher = {
+    get current() {
+      return ReactCurrentOwner.currentDispatcher;
+    },
+    set current(value) {
+      ReactCurrentOwner.currentDispatcher = value;
+    },
+  };
+}
+
 export default ReactSharedInternals;