From 5781918f84f5e113f13ed58fff53bfe7b7bf8fd4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mateusz=20Burzy=C5=84ski?= <mateuszburzynski@gmail.com>
Date: Sun, 19 May 2019 21:43:29 +0200
Subject: [PATCH] Fix issue with Tab+alt not being considered as
 isGlobalFocusVisible candidate on Mac

---
 packages/react-events/src/Focus.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/react-events/src/Focus.js b/packages/react-events/src/Focus.js
index 3d7b9e93dd77a..2e7103d378604 100644
--- a/packages/react-events/src/Focus.js
+++ b/packages/react-events/src/Focus.js
@@ -39,6 +39,8 @@ type FocusEvent = {|
   timeStamp: number,
 |};
 
+const isMac = /^Mac/.test(navigator.platform);
+
 const targetEventTypes = [
   {name: 'focus', passive: true},
   {name: 'blur', passive: true},
@@ -304,7 +306,7 @@ const FocusResponder = {
         const nativeEvent = event.nativeEvent;
         if (
           nativeEvent.key === 'Tab' &&
-          !(nativeEvent.metaKey || nativeEvent.altKey || nativeEvent.ctrlKey)
+          !(nativeEvent.metaKey || (!isMac && nativeEvent.altKey) || nativeEvent.ctrlKey)
         ) {
           state.pointerType = 'keyboard';
           isGlobalFocusVisible = true;