[fix] cache Clipboard.isAvailable() value

Fix #1149 Close #1150
2026-01-12 22:51:09 +08:00 · 2018-10-22 13:45:52 -07:00
parent 5033e12d18
commit 5855e55615
1 changed files with 8 additions and 3 deletions
--- 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> {