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@GENYA

react-hook-form isDirtyが立たないのはsetValue shouldDirty: true をしていないから

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react-hook-formで任意のフォームの状態を更新するときsetValueを使っている箇所はありませんか？

その時にsetValue('targetKey', value)とオプションをつけずに実行するとisDirtyがfalseのまま変わりません。

実際にユーザー操作に近い操作を期待する場合は、setValue('targetKey', value, {shouldDirty: true})とオプションをつけてあげるとisDirty: trueになります。

ref https://github.com/react-hook-form/react-hook-form/issues/72#issuecomment-656500986

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