AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.8.1" />

.NET API 1,172,480 bytes

 CssPositionProperty

Information can be found on MDN: https://developer.mozilla.org/en-US/docs/Web/CSS/position
using AngleSharp.Css; using AngleSharp.Extensions; namespace AngleSharp.Dom.Css { internal sealed class CssPositionProperty : CssProperty, ICssPositionProperty, ICssProperty { internal static readonly PositionMode Default = PositionMode.Static; internal static readonly IValueConverter<PositionMode> Converter = Map.PositionModes.ToConverter(); private PositionMode _mode; public PositionMode State => _mode; internal CssPositionProperty(CssStyleDeclaration rule) : base(PropertyNames.Position, rule, PropertyFlags.None) { Reset(); } public void SetState(PositionMode mode) { _mode = mode; } internal override void Reset() { _mode = Default; } protected override bool IsValid(ICssValue value) { return Converter.TryConvert(value, SetState); } } }