From a34b8b149fe323f7e32fbce3ca749160a8f087c5 Mon Sep 17 00:00:00 2001
From: Nicolas Gallagher <nicolasgallagher@gmail.com>
Date: Fri, 17 Feb 2017 10:07:52 -0800
Subject: [PATCH] [fix] V8 deopt in compiled 'createDOMElement'

Fixes V8 "deopt" warning: "Bad value context for arguments value".

This deopt was caused by the babel-compiled output of the ES6 argument
default value for 'rnProps':

    var t = arguments.length > 1 && void 0 !== arguments[1]
      ? arguments[1]
      : l

Not relying on ES6 default arguments avoids the function 'deopt'.
---
 src/modules/createDOMElement/index.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/modules/createDOMElement/index.js b/src/modules/createDOMElement/index.js
index a57c228b..e8567ebf 100644
--- a/src/modules/createDOMElement/index.js
+++ b/src/modules/createDOMElement/index.js
@@ -19,7 +19,7 @@ const roleComponents = {
   region: 'section'
 };
 
-const createDOMElement = (component, rnProps = emptyObject) => {
+const createDOMElement = (component, rnProps) => {
   const {
     accessibilityLabel,
     accessibilityLiveRegion,
@@ -29,7 +29,7 @@ const createDOMElement = (component, rnProps = emptyObject) => {
     testID,
     type,
     ...domProps
-  } = rnProps;
+  } = rnProps || emptyObject;
 
   const accessibilityComponent = accessibilityRole && roleComponents[accessibilityRole];
   const Component = accessibilityComponent || component;