AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.8.3" />

.NET API 1,189,376 bytes

 CssOpacityProperty

Information can be found on MDN: https://developer.mozilla.org/en-US/docs/Web/CSS/opacity Gets the value that should be used for the opacity.
using AngleSharp.Css; using AngleSharp.Extensions; namespace AngleSharp.Dom.Css { internal sealed class CssOpacityProperty : CssProperty { internal CssOpacityProperty(CssStyleDeclaration rule) : base(PropertyNames.Opacity, rule, PropertyFlags.Animatable) { } protected override object GetDefault(IElement element) { return 1; } protected override object Compute(IElement element) { return Converters.NumberConverter.Convert(base.Value); } protected override bool IsValid(ICssValue value) { return Converters.NumberConverter.Validate(value); } } }