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import React from 'react';
import { useFormState, useForm, Control } from 'react-hook-form';
let renderCounter = 0;
type FormInputs = {
firstName: string;
lastName: string;
min: string;
max: string;
minDate: string;
maxDate: string;
minLength: string;
minRequiredLength: string;
selectNumber: string;
pattern: string;
nestItem: {
nest1: string;
};
arrayItem: {
test1: string;
}[];
};
const SubForm = ({ control }: { control: Control<FormInputs> }) => {
const {
isDirty,
dirtyFields,
touchedFields,
isSubmitted,
isSubmitSuccessful,
submitCount,
isValid,
} = useFormState({
control,
});
return (
<p id="state">
{JSON.stringify({
isDirty,
touched: Object.keys(touchedFields),
dirty: Object.keys(dirtyFields),
isSubmitted,
isSubmitSuccessful,
submitCount,
isValid,
})}
</p>
);
};
export const UseFormState: React.FC = () => {
const { register, handleSubmit, control, reset } = useForm<FormInputs>({
mode: 'onChange',
});
const onValid = () => {};
renderCounter++;
return (
<form onSubmit={handleSubmit(onValid)}>
<input
placeholder="nest.nest1"
{...register('nestItem.nest1', { required: true })}
/>
<input
placeholder="arrayItem.0.test1"
{...register('arrayItem.0.test1', { required: true })}
/>
<input
{...register('firstName', { required: true })}
placeholder="firstName"
/>
<input
{...register('lastName', { required: true, maxLength: 5 })}
placeholder="lastName"
/>
<input
type="number"
{...register('min', { min: 10 })}
placeholder="min"
/>
<input
type="number"
{...register('max', { max: 20 })}
placeholder="max"
/>
<input
type="date"
{...register('minDate', { min: '2019-08-01' })}
placeholder="minDate"
/>
<input
type="date"
{...register('maxDate', { max: '2019-08-01' })}
placeholder="maxDate"
/>
<input
{...register('minLength', { minLength: 2 })}
placeholder="minLength"
/>
<input
{...register('minRequiredLength', { minLength: 2, required: true })}
placeholder="minRequiredLength"
/>
<select {...register('selectNumber', { required: true })}>
<option value="">Select</option>
<option value={1}>1</option>
<option value={2}>1</option>
</select>
<input
{...register('pattern', { pattern: /\d+/ })}
placeholder="pattern"
/>
<button id="submit">Submit</button>
<button type="button" id="resetForm" onClick={() => reset()}>
Reset
</button>
<div id="renderCount">{renderCounter}</div>
<SubForm control={control} />
</form>
);
};
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