Created
August 14, 2024 11:51
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| const useFormField = () => { | |
| const fieldContext = React.useContext(FormFieldContext) | |
| const itemContext = React.useContext(FormItemContext) | |
| const { getFieldState, formState } = useFormContext() // comes from from react-hook-form | |
| const fieldState = getFieldState(fieldContext.name, formState) | |
| if (!fieldContext) { | |
| throw new Error('useFormField should be used within <FormField>') | |
| } | |
| const { id } = itemContext | |
| return { | |
| id, | |
| name: fieldContext.name, | |
| formItemId: `${id}-form-item`, | |
| formDescriptionId: `${id}-form-item-description`, | |
| formMessageId: `${id}-form-item-message`, | |
| ...fieldState, | |
| } | |
| } | |
| const FormMessage = React.forwardRef< | |
| HTMLParagraphElement, | |
| React.HTMLAttributes<HTMLParagraphElement> | |
| >(({ className, children, ...props }, ref) => { | |
| const { error, formMessageId } = useFormField() | |
| const body = error ? String(error?.message) : children | |
| if (!body) { | |
| return null | |
| } | |
| return ( | |
| <p | |
| ref={ref} | |
| id={formMessageId} | |
| className={cn('text-[0.8rem] font-medium text-destructive', className)} | |
| {...props} | |
| > | |
| {body} | |
| </p> | |
| ) | |
| }) | |
| FormMessage.displayName = 'FormMessage' |
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