avoid globals

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

plugins/techdocs/src/reader/transformers/copyToClipboard.test.ts

@@ -20,7 +20,7 @@ import { lightTheme } from '@backstage/theme';
 import { waitFor } from '@testing-library/react';
 
 const clipboardSpy = jest.fn();
-Object.defineProperty(navigator, 'clipboard', {
+Object.defineProperty(window.navigator, 'clipboard', {
   value: {
     writeText: clipboardSpy,
   },

plugins/techdocs/src/reader/transformers/copyToClipboard.tsx

@@ -49,7 +49,7 @@ const CopyToClipboardButton = ({ text }: CopyToClipboardButtonProps) => {
   const [open, setOpen] = useState(false);
 
   const handleClick = useCallback(() => {
-    navigator.clipboard.writeText(text);
+    window.navigator.clipboard.writeText(text);
     setOpen(true);
   }, [text]);