From 0f7cc2ba845e34d7a312819e27bbfa88cdb7d49f Mon Sep 17 00:00:00 2001
From: Nicolas Gallagher <necolas@fb.com>
Date: Wed, 29 May 2019 20:19:31 -0700
Subject: [PATCH] React Events: check window before using navigator (#15768)

---
 packages/react-events/src/Press.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/react-events/src/Press.js b/packages/react-events/src/Press.js
index 30e2481d3a..1a3e0318a4 100644
--- a/packages/react-events/src/Press.js
+++ b/packages/react-events/src/Press.js
@@ -101,7 +101,10 @@ type PressEvent = {|
   shiftKey: boolean,
 |};
 
-const isMac = /^Mac/.test(navigator.platform);
+const isMac =
+  typeof window !== 'undefined' && window.navigator != null
+    ? /^Mac/.test(window.navigator.platform)
+    : false;
 const DEFAULT_PRESS_END_DELAY_MS = 0;
 const DEFAULT_PRESS_START_DELAY_MS = 0;
 const DEFAULT_LONG_PRESS_DELAY_MS = 500;