# Build-in validators

You can be used build-in validators of below:

- `required`: whether the value has been specified
- `pattern`: whether the pattern of the regular expression
- `minlength`: whether the length of specified value is less than or equal minimum length
- `maxlength`: whether the length of specified value is less more or equal maximum length
- `min`: whether the specified numerical value is less than or equal minimum
- `max`: whether the specified numerical value is more than or equal maximum

See more about [API section](/api.html#buildin-validators).
