From cc355dcee9edbf5fd820dfbf54f47ee11dd32d62 Mon Sep 17 00:00:00 2001
From: Vojtech Novak <vonovak@gmail.com>
Date: Tue, 21 Nov 2017 15:54:46 +0100
Subject: [PATCH] return null if it is passed (#3021)

---
 src/views/Header/Header.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/views/Header/Header.js b/src/views/Header/Header.js
index e4965a8c..3d70d53d 100644
--- a/src/views/Header/Header.js
+++ b/src/views/Header/Header.js
@@ -142,7 +142,10 @@ class Header extends React.PureComponent<Props, State> {
   _renderLeftComponent = (props: SceneProps): ?React.Node => {
     // $FlowFixMe
     const { options } = this.props.getScreenDetails(props.scene);
-    if (React.isValidElement(options.headerLeft)) {
+    if (
+      React.isValidElement(options.headerLeft) ||
+      options.headerLeft === null
+    ) {
       return options.headerLeft;
     }
     if (props.scene.index === 0) {