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[bug] Copy message button does not work on web interface #27992
Description
Description
On the web interface, clicking the "Copy" button on a message does not copy the content to the clipboard. This happens because navigator.clipboard.writeText() can fail in non-secure contexts (non-HTTPS) or when the clipboard API is blocked by browser permissions.
Steps to reproduce
- Open the OpenCode web interface
- Click the copy button on any message
- The button does not copy the content and no feedback is shown
Fix
Added a fallback using the traditional document.execCommand("copy") method via a temporary textarea element, which works even when the Clipboard API is unavailable. Also added a check to only update the "copied" state if the copy actually succeeded.
Operating System
All platforms
Terminal/Environment
Web browser
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github-actions commentedon May 17, 2026
This issue might be a duplicate of existing issues. Please check:
navigator.clipboard.writeText()requires a secure context) with the same proposeddocument.execCommand("copy")fallback fix.Please review that issue and consider whether your report adds anything new. If so, feel free to clarify the distinction.