AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.8.4" />

.NET API 1,229,312 bytes

 CssTransitionPropertyProperty

More information available at: https://developer.mozilla.org/en-US/docs/CSS/transition-property Gets the names of the selected properties.
using AngleSharp.Css; using AngleSharp.Extensions; namespace AngleSharp.Dom.Css { internal sealed class CssTransitionPropertyProperty : CssProperty { private static readonly IValueConverter<string[]> Converter = Converters.AnimatableConverter.FromList().Or(Keywords.None, new string[0]); internal CssTransitionPropertyProperty(CssStyleDeclaration rule) : base(PropertyNames.TransitionProperty, rule, PropertyFlags.None) { } protected override object GetDefault(IElement element) { return Keywords.All; } protected override object Compute(IElement element) { return Converter.Convert(base.Value); } protected override bool IsValid(CssValue value) { return Converter.Validate(value); } } }