Prevent form submission during IME composition#134
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haydenbleasel merged 1 commit intovercel:mainfrom Oct 15, 2025
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Add composition event handlers to PromptInputTextarea to prevent premature form submission when users press Enter to confirm IME input (e.g., Japanese, Chinese, Korean). The component now tracks composition state explicitly using onCompositionStart and onCompositionEnd events, in addition to checking the native isComposing property. This fixes an issue where Japanese users typing with an IME would accidentally submit the form when pressing Enter to convert kanji, instead of just confirming the conversion. Signed-off-by: Sora Morimoto <sora@morimoto.io>
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@smorimoto is attempting to deploy a commit to the Vercel Team on Vercel. A member of the Team first needs to authorize it. |
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Nice one, thanks @smorimoto 🙏 |
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Summary
Fixes form submission during IME composition in
PromptInputTextarea.Problem
When users type in Japanese (or other languages requiring IME), pressing Enter to confirm character conversion would incorrectly submit the form instead of just completing the conversion. This made the input field difficult to use for CJK language users.
Solution
Added explicit composition state tracking using:
onCompositionStart: SetsisComposingtotrueonCompositionEnd: SetsisComposingtofalsehandleKeyDownto check both the localisComposingstate ande.nativeEvent.isComposingThis ensures the Enter key during composition is handled by the IME, not the form submission logic.
Testing
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