## Available Rules

Validation rules do not have an implicit 'required'. If a field is _undefined_ or an empty string, it will pass validation. If you want a validation to fail for undefined or '', use the _required_ rule.

#### accepted

The field under validation must be yes, on, 1 or true. This is useful for validating "Terms of Service" acceptance.

#### after:date

The field under validation must be after the given date.

#### after_or_equal:date

The field unter validation must be after or equal to the given field

#### alpha

The field under validation must be entirely alphabetic characters.

#### alpha_dash

The field under validation may have alpha-numeric characters, as well as dashes and underscores.

#### alpha_num

The field under validation must be entirely alpha-numeric characters.

#### array

The field under validation must be an array.

#### before:date

The field under validation must be before the given date.

#### before_or_equal:date

The field under validation must be before or equal to the given date.

#### between:min,max

The field under validation must have a size between the given min and max. Strings, numerics, and files are evaluated in the same fashion as the size rule.

#### boolean

The field under validation must be a boolean value of the form `true`, `false`, `0`, `1`, `'true'`, `'false'`, `'0'`, `'1'`,

#### confirmed

The field under validation must have a matching field of foo_confirmation. For example, if the field under validation is password, a matching password_confirmation field must be present in the input.

#### date

The field under validation must be a valid date format which is acceptable by Javascript's `Date` object.

#### digits:value

The field under validation must be numeric and must have an exact length of value.

#### digits_between:min,max

The field under validation must be numeric and must have length between given min and max.

#### different:attribute

The given field must be different than the field under validation.

#### email

The field under validation must be formatted as an e-mail address.

#### hex

The field under validation should be a hexadecimal format. Useful in combination with other rules, like `hex|size:6` for hex color code validation.

#### in:foo,bar,...

The field under validation must be included in the given list of values. The field can be an array or string.

#### integer

The field under validation must have an integer value.

#### max:value

Validate that an attribute is no greater than a given size

_Note: Maximum checks are inclusive._

#### min:value

Validate that an attribute is at least a given size.

_Note: Minimum checks are inclusive._

#### not_in:foo,bar,...

The field under validation must not be included in the given list of values.

#### numeric

Validate that an attribute is numeric. The string representation of a number will pass.

#### present

The field under validation must be present in the input data but can be empty.

#### required

Checks if the length of the String representation of the value is >

#### required_if:anotherfield,value

The field under validation must be present and not empty if the anotherfield field is equal to any value.

#### required_unless:anotherfield,value

The field under validation must be present and not empty unless the anotherfield field is equal to any value.

#### required_with:foo,bar,...

The field under validation must be present and not empty only if any of the other specified fields are present.

#### required_with_all:foo,bar,...

The field under validation must be present and not empty only if all of the other specified fields are present.

#### required_without:foo,bar,...

The field under validation must be present and not empty only when any of the other specified fields are not present.

#### required_without_all:foo,bar,...

The field under validation must be present and not empty only when all of the other specified fields are not present.

#### same:attribute

The given field must match the field under validation.

#### size:value

The field under validation must have a size matching the given value. For string data, value corresponds to the number of characters. For numeric data, value corresponds to a given integer value.

#### string

The field under validation must be a string.

#### url

Validate that an attribute has a valid URL format

#### regex:pattern

The field under validation must match the given regular expression.

**Note**: When using the ``regex`` pattern, it may be necessary to specify rules in an array instead of using pipe delimiters, especially if the regular expression contains a pipe character.
For each backward slash that you used in your regex pattern, you must escape each one with another backward slash.

#### Example 3 - Regex validation

```js

forms.useRules({
  name: 'required|size:3',
  salary: ['required', 'regex:/^(?!0\\.00)\\d{1,3}(,\\d{3})*(\\.\\d\\d)?$/'],
  yearOfBirth: ['required', 'regex:/^(19|20)[\\d]{2,2}$/']
})
```

The valid data will be like,

```js

{
  name: 'Doe',
  salary: '10,000.00',
  yearOfBirth: '1980'
}
```

#### Example 4 - Type Checking Validation

```js

form.useRules({
  age: ['required', { 'in': [29, 30] }],
  name: [{ required_if: ['age', 30] }]
});

```

The valid data will be like,

```js
{
  age: 30,
  name: ''
}
```