NotAllowedError: Failed to execute 'writeText' on 'Clipboard': Document is not focused.
The Clipboard API refused to write — the page isn’t focused, there was no user gesture, or the context isn’t secure.
Exact message you may see
Document is not focusedCannot read properties of undefined (reading 'writeText')
Seen on:
JavaScript
Meaning
navigator.clipboard requires HTTPS (or localhost), a focused document and usually a user gesture. It’s undefined on plain HTTP.
Common causes
- Page served over HTTP (navigator.clipboard undefined)
- Called without a click
- DevTools focused instead of the page
- Iframe without clipboard-write permission
⚡ Quick fix
- Serve over HTTPS
- Call from a click handler
- Add allow="clipboard-write" on iframes
- Fall back to document.execCommand('copy')
Detailed fix by platform
JavaScript
button.addEventListener('click', () => navigator.clipboard.writeText(text));
How to diagnose
- Context — HTTPS?
- Gesture — Triggered by a click?
🔧 Still not fixed?
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Last updated 14 Oct 2026