AngleSharp by Florian Rappl

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

.NET API 1,172,480 bytes

CssFontWeightProperty

sealed class CssFontWeightProperty : CssProperty, ICssFontWeightProperty, ICssProperty

Information: https://developer.mozilla.org/en-US/docs/Web/CSS/font-weight

public bool IsRelative { get; }

public int Weight { get; }