AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.6.1" />

.NET API 886,784 bytes

 IValidityState

public interface IValidityState
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.
namespace AngleSharp.DOM.Html { [DomName("ValidityState")] public interface IValidityState { [DomName("valueMissing")] bool IsValueMissing { get; } [DomName("typeMismatch")] bool IsTypeMismatch { get; } [DomName("patternMismatch")] bool IsPatternMismatch { get; } [DomName("tooLong")] bool IsTooLong { get; } [DomName("rangeUnderflow")] bool IsRangeUnderflow { get; } [DomName("rangeOverflow")] bool IsRangeOverflow { get; } [DomName("stepMismatch")] bool IsStepMismatch { get; } [DomName("customError")] bool IsCustomError { get; } [DomName("valid")] bool IsValid { get; } } }