From bb149c817083d3b2d6473c2e8f4f89b14886b790 Mon Sep 17 00:00:00 2001
From: Vincent Taing <taing.vincent@gmail.com>
Date: Mon, 6 Mar 2017 15:20:12 -0800
Subject: [PATCH] Fix redundant null type coercion (#9114)

---
 .../shared/stack/reconciler/ReactUpdateQueue.js      | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/renderers/shared/stack/reconciler/ReactUpdateQueue.js b/src/renderers/shared/stack/reconciler/ReactUpdateQueue.js
index 19aee0d985..8e77b3346e 100644
--- a/src/renderers/shared/stack/reconciler/ReactUpdateQueue.js
+++ b/src/renderers/shared/stack/reconciler/ReactUpdateQueue.js
@@ -134,8 +134,8 @@ var ReactUpdateQueue = {
       return;
     }
 
-    if (callback) {
-      callback = callback === undefined ? null : callback;
+    callback = callback === undefined ? null : callback;
+    if (callback !== null) {
       if (__DEV__) {
         warnOnInvalidCallback(callback, callerName);
       }
@@ -174,8 +174,8 @@ var ReactUpdateQueue = {
     internalInstance._pendingStateQueue = [completeState];
     internalInstance._pendingReplaceState = true;
 
-    if (callback) {
-      callback = callback === undefined ? null : callback;
+    callback = callback === undefined ? null : callback;
+    if (callback !== null) {
       if (__DEV__) {
         warnOnInvalidCallback(callback, callerName);
       }
@@ -222,8 +222,8 @@ var ReactUpdateQueue = {
       (internalInstance._pendingStateQueue = []);
     queue.push(partialState);
 
-    if (callback) {
-      callback = callback === undefined ? null : callback;
+    callback = callback === undefined ? null : callback;
+    if (callback !== null) {
       if (__DEV__) {
         warnOnInvalidCallback(callback, callerName);
       }