From edb07c1f642afcdd70e625f03e0003d3009b9a04 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rub=C3=A9n=20Norte?= <rubennorte@fb.com>
Date: Fri, 17 May 2019 09:59:01 -0700
Subject: [PATCH] Fallback to empty object when native module constants are not
 defined

Summary: Force `getConstants` in native modules to return an empty object when they're not defined in their native implementations.

Reviewed By: fkgozali

Differential Revision: D15393585

fbshipit-source-id: cdda9df0d0f0a98ba226340d3cee67fec63e106c
---
 Libraries/BatchedBridge/NativeModules.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Libraries/BatchedBridge/NativeModules.js b/Libraries/BatchedBridge/NativeModules.js
index a916f37b3ab..df60fc87001 100644
--- a/Libraries/BatchedBridge/NativeModules.js
+++ b/Libraries/BatchedBridge/NativeModules.js
@@ -64,7 +64,7 @@ function genModule(
   Object.assign(module, constants);
 
   if (module.getConstants == null) {
-    module.getConstants = () => constants;
+    module.getConstants = () => constants || Object.freeze({});
   } else {
     console.warn(
       `Unable to define method 'getConstants()' on NativeModule '${moduleName}'. NativeModule '${moduleName}' already has a constant or method called 'getConstants'. Please remove it.`,