The ValidityState interface represents the validity states that an element can be in, with respect to constraint validation. Together, they help explain why an element's value fails to validate, if it's not valid.

Documentation ValidityState by Mozilla Contributors, licensed under CC-BY-SA 2.5.

See:

Variables

read onlybadInput:Bool

Is a Boolean indicating the user has provided input that the browser is unable to convert.

read onlycustomError:Bool

Is a Boolean indicating the element's custom validity message has been set to a non-empty string by calling the element's setCustomValidity() method.

read onlypatternMismatch:Bool

Is a Boolean indicating the value does not match the specified pattern.

read onlyrangeOverflow:Bool

Is a Boolean indicating the value is greater than the maximum specified by the max attribute.

read onlyrangeUnderflow:Bool

Is a Boolean indicating the value is less than the minimum specified by the min attribute.

read onlystepMismatch:Bool

Is a Boolean indicating the value does not fit the rules determined by the step attribute (that is, it's not evenly divisible by the step value).

read onlytooLong:Bool

Is a Boolean indicating the value exceeds the specified maxlength for HTMLInputElement or HTMLTextAreaElement objects. Note: This will never be true in Gecko, because elements' values are prevented from being longer than maxlength.

read onlytooShort:Bool

Is a Boolean indicating the value fails to meet the specified minlength for HTMLInputElement or HTMLTextAreaElement objects.

read onlytypeMismatch:Bool

Is a Boolean indicating the value is not in the required syntax (when type is email or url).

read onlyvalid:Bool

Is a Boolean indicating the element meets all constraint validations, and is therefore considered to be valid.

read onlyvalueMissing:Bool

Is a Boolean indicating the element has a required attribute, but no value.