# Field: Validation

> Native constraints like `required` and `minLength` are checked on blur. Give each `<FieldError />` a `match` to word the message per problem. An empty required field is only flagged after it has been edited, so tabbing past it doesn’t shout.

Example: https://hextaui.com/docs/field/examples/validation
Component docs: https://hextaui.com/docs/field.md

## Add this example

```bash
npx shadcn@latest add https://hextaui.com/r/field-validation.json
```

This adds `components/examples/field/validation.tsx` with the Field component and the HextaUI theme tokens.

## Source

```tsx title="components/examples/field/validation.tsx"
import {
  Field,
  FieldDescription,
  FieldError,
  FieldLabel,
} from "@/components/ui/field"
import { Input } from "@/components/ui/input"

export function FieldValidation() {
  return (
    <Field validationMode="onBlur" className="max-w-sm">
      <FieldLabel>Password</FieldLabel>
      <Input
        type="password"
        autoComplete="new-password"
        required
        minLength={8}
      />
      <FieldDescription>At least 8 characters.</FieldDescription>
      <FieldError match="valueMissing">Choose a password.</FieldError>
      <FieldError match="tooShort">
        That’s too short. Use 8 or more characters.
      </FieldError>
    </Field>
  )
}
```

## Props in this example

### Field

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `validationMode` | `"onSubmit" \| "onBlur" \| "onChange"` | `"onSubmit"` |  |

### FieldError

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `match` | `boolean \| "valueMissing" \| "typeMismatch" \| "tooShort" \| "tooLong" \| "patternMismatch" \| "rangeOverflow" \| "rangeUnderflow" \| "stepMismatch" \| "badInput" \| "customError" \| "valid"` | – | Show only for this validity problem. true always shows it. |

## More Field examples

- [Input](https://hextaui.com/docs/field/examples/input.md)
- [Custom validation](https://hextaui.com/docs/field/examples/custom-validation.md)
- [Required and optional](https://hextaui.com/docs/field/examples/indicator.md)
- [Status](https://hextaui.com/docs/field/examples/status.md)
- [Character count](https://hextaui.com/docs/field/examples/counter.md)
- [Errors from a form library or server](https://hextaui.com/docs/field/examples/errors.md)
- [Checkboxes](https://hextaui.com/docs/field/examples/checkbox.md)
- [Choice cards](https://hextaui.com/docs/field/examples/choice-card.md)
- [Fieldset](https://hextaui.com/docs/field/examples/fieldset.md)
- [Responsive](https://hextaui.com/docs/field/examples/responsive.md)
- [Disabled](https://hextaui.com/docs/field/examples/disabled.md)
- [Long content](https://hextaui.com/docs/field/examples/long-content.md)
- [Right to left](https://hextaui.com/docs/field/examples/rtl.md)