From 5855e55615363f733ef8d563f7bad061af889655 Mon Sep 17 00:00:00 2001
From: Charlie Croom <ccroom@twitter.com>
Date: Mon, 22 Oct 2018 13:45:52 -0700
Subject: [PATCH] [fix] cache Clipboard.isAvailable() value

Fix #1149
Close #1150
---
 .../react-native-web/src/exports/Clipboard/index.js   | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/packages/react-native-web/src/exports/Clipboard/index.js b/packages/react-native-web/src/exports/Clipboard/index.js
index 83fd93e1..ff7287cb 100644
--- a/packages/react-native-web/src/exports/Clipboard/index.js
+++ b/packages/react-native-web/src/exports/Clipboard/index.js
@@ -8,11 +8,16 @@
  * @flow
  */
 
+let clipboardAvailable;
+
 export default class Clipboard {
   static isAvailable() {
-    return (
-      typeof document.queryCommandSupported === 'function' && document.queryCommandSupported('copy')
-    );
+    if (clipboardAvailable === undefined) {
+      clipboardAvailable =
+        typeof document.queryCommandSupported === 'function' &&
+        document.queryCommandSupported('copy');
+    }
+    return clipboardAvailable;
   }
 
   static getString(): Promise<string> {