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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.
Properties
For each of these Boolean properties, a value of true indicates that the specified reason validation may have failed is true, with the exception of the valid property, which is true if the element's value obeys all constraints.
| Name | Type | Description |
|---|---|---|
customError |
Boolean | The element's custom validity message has been set to a non-empty string by calling the element's setCustomValidity() method. |
patternMismatch |
Boolean | The value does not match the specified pattern. |
rangeOverflow |
Boolean | The value is greater than the maximum specified by the max attribute. |
rangeUnderflow |
Boolean | The value is less than the minimum specified by the min attribute. |
stepMismatch |
Boolean | The value does not fit the rules determined by the step attribute (that is, it's not evenly divisible by the step value). |
tooLong |
Boolean |
The value exceeds the specified
Note: This will never be
true in Gecko, because elements' values are prevented from being longer than maxlength. |
typeMismatch |
Boolean | The value is not in the required syntax (when type is email or url). |
valid |
Boolean | The element meets all constraint validations, and is therefore considered to be valid. |
valueMissing |
Boolean | The element has a required attribute, but no value. |