Released on Friday, July 31 2026.

• Fixed NRE in mask-image with gradients (#218)

Released on Sunday, July 26 2026.

What's Changed

• First stable version; see: #216

Full Changelog: v0.18.0...v1.0.0

Released on Saturday, July 25 2026.

What's Changed

• Updated to use AngleSharp minimum version of 1.5 (#150)
• Updated media parsing to media L4 spec (#133)
• Updated naming of CSS values (e.g., Color to CssColorValue)
• Updated ColorParser.cs by @jogibear9988 in #141
• Fixed NullReferenceException in ChangeDeclarations by @meziantou in #160
• Fixed nullable reference exception in CssOriginValue by @meziantou in #162
• Fixed CssValue.Equals implementation by @meziantou in #163
• Fixed NullReferenceException in CssShadowValue by @meziantou in #164
• Fixed issue when updating shorthands with invalid values (#129)
• Fixed issue with appended EOF character in CssText (#123)
• Fixed missing semicolon in @page rule (#135)
• Fixed integer serialization of keyframe stops (#128)
• Fixed ordering of rows and columns in grid and grid-gap (#137)
• Fixed inclusion of CSS from stylesheets (#116, #140)
• Fixed style empty if text-align is start (#151)
• Fixed computation of priority in CSS rules using multi selector
• Fixed GetInnerText skipping table tabs/newlines when HTML has whitespace between elements by @jafin in #204
• Fixed GetInnerText multi-line / text node behavior (#155) @Seyden
• Fixed computation of relative (em) values to absolute (px) for Length (#136)
• Added further compactification of CSS tuples (#89, #93)
• Added new value types CssPercentageValue, CssNumberValue, and CssIntegerValue
• Added support for CSS nesting in style rules (#148)
• Added resolution of CSS variable names (#62)
• Added support for 8-digit hex color codes (#132)
• Added support for margin-block and margin-inline declarations
• Added support for padding-block and padding-inline declarations
• Added missing box model declarations (e.g., aspect-ratio, block-size, overflow-clip-margin)
• Added missing logical declarations (e.g., inset, border-inline, border-end-start-radius)
• Added missing alignment declarations (e.g., justify-items, place-content)
• Added missing animations declarations (e.g., animation-composition, animation-delay-start)
• Added missing scroll declarations (e.g., scroll-behavior, overscroll-behavior)
• Added missing fonts declarations (e.g., font-display, font-palette, font-synthesis)
• Added missing color declarations (e.g., color-scheme, accent-color)
• Added missing compositing declarations (e.g., backdrop-filter, isolation)
• Added missing shape declarations (e.g., shape-outside, shape-rendering)
• Added missing anchor positioning declarations (e.g., anchor-name, anchor-scope, position-anchor)
• Added missing text declarations (e.g., text-underline-offset, tab-size, initial-letter)
• Added missing masking declarations (e.g., mask-image, mask-border-source)
• Added missing auxiliary declarations (e.g., counter-set, image-rendering, view-transition-name)
• Added missing containment declarations (e.g., contain, will-change)
• Added more CSSOM possibilities and helpers (#6)
• Added more rules such as @view-transition or @layer
• Added parts of recent color spec update such as rgb with spaces (#131)
• Added now Color L4 parsing with hsl, hwb, lab, lch, oklab, and oklch
• Added support for recent CSS list-type values (#152)
• Added option to preserve comments in CSS stylesheet (#99)
• Added support for CSS container queries

New Contributors

• @SebastianStehle made their first contribution in #176
• @NSGolova made their first contribution in #185
• @mariusz96 made their first contribution in #188
• @lahma made their first contribution in #192
• @jafin made their first contribution in #196
• @monoblaine made their first contribution in #214

Full Changelog: v0.17.0...v0.18.0

Released on Sunday, January 15 2023.

What's Changed

• Updated build system to use NUKE instead of CAKE
• Dropped .NET Framework 4.6
• Updated to use AngleSharp 0.17
• Updated micro parser API to be public (#111)
• Fixed casing issue with color, timing, and gradient functions (#109)
• Fixed parsing of skew (#101)
• Fixed shorthand properties using inherit being omitted (#100)
• Fixed escape property name by @MartinWelsch in #121
• Added support for @counter-style (#102)
• Added support for @font-feature-values (#102)
• Added support for conic-gradient (#101)
• Added support for scroll-snap-type declaration (#91)

New Contributors

• @MartinWelsch made their first contribution in #121

Full Changelog: v0.16.4...v0.17.0

Released on Tuesday, February 15 2022.

• Fixed issue with wrong AngleSharp version used for build (#103)

Released on Wednesday, January 5 2022.

• Fixed issue with text-shadow missing the color part (#97)
• Fixed support for IsToleratingInvalidSelectors parser option (#98)
• Added Color.UseHex to change color output format (#96)

Released on Thursday, November 4 2021.

• Fixed issue with unbalanced grid areas and rows (#82)
• Fixed small numbers to be transformed into negative exponentials (#80)
• Fixed issue handling exponential unit values (#79)
• Fixed InvalidCastException in template merging with CSS variables (#83)

Released on Wednesday, August 11 2021.

• Fixed issue with certain letter combinations in data URIs (#76)
• Added support for xxx-large keyword in font-size (#77)

Released on Sunday, June 13 2021.

• Updated to use AngleSharp 0.16

Released on Thursday, April 22 2021.

• Added fill declaration (#59)
• Added support for legacy linear-gradient syntax (#66)
• Fixed parsing of background: none (#65)
• Fixed issues with brackets being removed for calc expressions (#67)
• Fixed issue throwing in grid-template: none serializations (#63, #68)
• Dropped support for the .NET Standard 1.3 target