CSS Color Module Level 4

Candidate Standard

25 August 2026 - history

CSS Color Module Level 5

Draft Standard

31 July 2026 - history

CSS Color Module Level 3

Standard

18 January 2022 - history

CSS Fonts Module Level 4

Draft Standard

25 August 2026 - history

CSS Fonts Module Level 5

Draft Standard

11 August 2026 - history

CSS Fonts Module Level 3

Standard

20 September 2018 - history

CSS Text Module Level 3

Candidate Standard

14 August 2026 - history

CSS Text Module Level 4

Draft Standard

14 August 2026 - history

Requirements for Chinese Text Layout - 中文排版需求

Draft Note

4 August 2026 - history

Requirements for Hangul Text Layout and Typography - 한국어 텍스트 레이아웃 및 타이포그래피를 위한 요구사항

Draft Note

21 March 2026 - history

Requirements for Japanese Text Layout 日本語組版処理の要件(日本語版)

Note

11 August 2020 - history

Ethiopic Layout Requirements

Draft Standard

26 May 2020 - history

CSS Color HDR Module Level 1

Draft Standard

28 July 2026 - history

CSS Linked Parameters Module Level 1

Draft Standard

14 July 2026 - history

TTML Media Type Definition and Profile Registry

Note

2 July 2026 - history

Dubbing and Audio description Profiles of TTML2

Candidate Standard

26 June 2026 - history

Timed Text Markup Language 2 (TTML2) (2nd Edition)

Candidate Standard

9 March 2021 - history

Timed Text Markup Language 2 (TTML2)

Standard

8 November 2018 - history

CSS Gaps Module Level 1

Draft Standard

24 June 2026 - history

CSS Snapshot 2026

Note

22 June 2026 - history

CSS Snapshot 2025

Note

18 September 2025 - history

CSS Snapshot 2024

Note

25 February 2025 - history

CSS Snapshot 2023

Note

7 December 2023 - history

CSS Snapshot 2022

Draft Note

22 November 2022 - history

CSS Snapshot 2021

Note

31 December 2021 - history

Cascading Style Sheets Level 2 Revision 2 (CSS 2.2) Specification

Draft Standard

12 April 2016 - history

Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification

Standard

7 June 2011 - history

CSS Display Module Level 3

Candidate Standard

5 June 2026 - history

CSS Display Module Level 4

Draft Standard

6 November 2025 - history

WebVTT: The Web Video Text Tracks Format

Candidate Standard

20 May 2026 - history

CSS Image Animation Module Level 1

Draft Standard

9 April 2026 - history

CSS Images Module Level 4

Draft Standard

30 September 2025 - history

CSS Images Module Level 3

Candidate Standard

18 December 2023 - history

CSS Basic User Interface Module Level 3 (CSS3 UI)

Standard

7 April 2026 - history

CSS Basic User Interface Module Level 4

Draft Standard

20 January 2026 - history

CSS Anchor Positioning Module Level 1

Draft Standard

27 March 2026 - history

CSS Anchor Positioning Module Level 2

Draft Standard

21 October 2025 - history

Media Queries Level 4

Candidate Standard

19 February 2026 - history

Media Queries Level 5

Draft Standard

19 February 2026 - history

Media Queries Level 3

Standard

21 May 2024 - history

CSS Rhythmic Sizing Module Level 1

Draft Standard

17 February 2026 - history

Selectors Level 5

Draft Standard

17 February 2026 - history

Selectors Level 4

Draft Standard

22 January 2026 - history

Selectors Level 3

Standard

6 November 2018 - history

CSS Transitions Module Level 2

Draft Standard

4 February 2026 - history

CSS Transitions Module Level 1

Draft Standard

8 January 2026 - history

CSS Box Alignment Module Level 3

Draft Standard

30 January 2026 - history

CSS Nesting Module Level 1

Draft Standard

22 January 2026 - history

CSS Syntax Module Level 3

Candidate Standard

24 December 2021 - history

CSS Grid Layout Module Level 3

Draft Standard

21 January 2026 - history

CSS Grid Layout Module Level 1

Candidate Standard

26 March 2025 - history

CSS Grid Layout Module Level 2

Candidate Standard

26 March 2025 - history

CSS Borders and Box Decorations Module Level 4

Draft Standard

16 December 2025 - history

CSS Backgrounds Module Level 4

Draft Standard

25 November 2025 - history

CSS Backgrounds and Borders Module Level 3

Candidate Standard

11 March 2024 - history

CSS Color Adjustment Module Level 1

Candidate Standard

16 December 2025 - history

CSS Shadow Parts Module Level 1

Draft Standard

16 December 2025 - history

CSS Table Module Level 3

Draft Standard

16 December 2025 - history

CSS Generated Content Module Level 3

Draft Standard

4 December 2025 - history

CSS Logical Properties and Values Module Level 1

Draft Standard

4 December 2025 - history

Geometry Interfaces Module Level 1

Candidate Standard

4 December 2025 - history

Web Animations Module Level 2

Draft Standard

20 November 2025 - history

Scroll-driven Animations

Draft Standard

6 June 2023 - history

Web Animations

Draft Standard

5 June 2023 - history

CSS Animations Level 2

Draft Standard

2 June 2023 - history

CSS Animations Level 1

Draft Standard

2 March 2023 - history

CSS Animation Worklet API

Draft Standard

25 June 2019 - history

CSS Conditional Rules Module Level 5

Draft Standard

30 October 2025 - history

CSS Conditional Rules Module Level 4

Candidate Standard

4 September 2025 - history

CSS Conditional Rules Module Level 3

Candidate Standard

15 August 2024 - history

CSS Flexible Box Layout Module Level 1

Candidate Standard

14 October 2025 - history

CSS Overflow Module Level 3

Draft Standard

7 October 2025 - history

CSS Overflow Module Level 5

Draft Standard

17 December 2024 - history

CSS Overflow Module Level 4

Draft Standard

21 March 2023 - history

CSS Positioned Layout Module Level 3

Draft Standard

7 October 2025 - history

CSS Positioned Layout Module Level 4

Draft Standard

7 October 2025 - history

CSS Environment Variables Module Level 1

Draft Standard

23 September 2025 - history

CSSOM View Module

Draft Standard

16 September 2025 - history

CSS Typed OM Level 1

Draft Standard

21 March 2024 - history

CSS Object Model (CSSOM)

Draft Standard

26 August 2021 - history

CSS Pseudo-Elements Module Level 4

Draft Standard

27 June 2025 - history

CSS Shapes Module Level 1

Candidate Standard

12 June 2025 - history

CSS Functions and Mixins Module

Draft Standard

15 May 2025 - history

CSS Form Control Styling Level 1

Draft Standard

25 March 2025 - history

Ready-made Counter Styles

Note

7 March 2025 - history

CSS Multi-column Layout Module Level 2

Draft Standard

19 December 2024 - history

CSS Multi-column Layout Module Level 1

Candidate Standard

16 May 2024 - history

CSS Inline Layout Module Level 3

Draft Standard

18 December 2024 - history

CSS View Transitions Module Level 2

Draft Standard

13 November 2024 - history

CSS View Transitions Module Level 1

Candidate Standard

28 March 2024 - history

CSS Values and Units Module Level 5

Draft Standard

11 November 2024 - history

CSS Values and Units Module Level 3

Candidate Standard

22 March 2024 - history

CSS Values and Units Module Level 4

Draft Standard

12 March 2024 - history

Motion Path Module Level 1

Draft Standard

5 November 2024 - history

CSS Cascading and Inheritance Level 6

Draft Standard

6 September 2024 - history

CSS Cascading and Inheritance Level 4

Candidate Standard

13 January 2022 - history

CSS Cascading and Inheritance Level 5

Candidate Standard

13 January 2022 - history

CSS Cascading and Inheritance Level 3

Standard

11 February 2021 - history

CSS Easing Functions Level 2

Draft Standard

29 August 2024 - history

CSS Easing Functions Level 1

Candidate Standard

13 February 2023 - history

CSS Box Model Module Level 4

Draft Standard

4 August 2024 - history

CSS Box Model Module Level 3

Standard

11 April 2024 - history

CSS Scroll Snap Module Level 2

Draft Standard

23 July 2024 - history

CSS Scroll Snap Module Level 1

Candidate Standard

11 March 2021 - history

CSS Containment Module Level 1

Standard

25 June 2024 - history

CSS Containment Module Level 2

Draft Standard

17 September 2022 - history

CSS Containment Module Level 3

Draft Standard

18 August 2022 - history

CSS Properties and Values API Level 1

Draft Standard

26 March 2024 - history

Compositing and Blending Level 1

Candidate Standard

21 March 2024 - history

CSS Generated Content for Paged Media Module

Draft Standard

25 January 2024 - history

CSS Viewport Module Level 1

Draft Standard

25 January 2024 - history

CSS Paged Media Module Level 3

Draft Standard

14 September 2023 - history

CSS Font Loading Module Level 3

Draft Standard

6 April 2023 - history

CSS Speech Module Level 1

Candidate Standard

14 February 2023 - history

CSS Ruby Annotation Layout Module Level 1

Draft Standard

31 December 2022 - history

CSS Custom Properties for Cascading Variables Module Level 1

Candidate Standard

16 June 2022 - history

CSS Text Decoration Module Level 3

Candidate Standard

5 May 2022 - history

CSS Text Decoration Module Level 4

Draft Standard

4 May 2022 - history

CSS Will Change Module Level 1

Candidate Standard

5 May 2022 - history

CSS Box Sizing Module Level 3

Draft Standard

17 December 2021 - history

CSS Box Sizing Module Level 4

Draft Standard

20 May 2021 - history

CSS Painting API Level 1

Candidate Standard

16 December 2021 - history

CSS Custom Highlight API Module Level 1

Draft Standard

15 December 2021 - history

CSS Scrollbars Styling Module Level 1

Candidate Standard

9 December 2021 - history

CSS Transforms Module Level 2

Draft Standard

9 November 2021 - history

CSS Transforms Module Level 1

Candidate Standard

14 February 2019 - history

CSS Masking Module Level 1

Candidate Standard

5 August 2021 - history

CSS Counter Styles Level 3

Candidate Standard

27 July 2021 - history

CSS Lists and Counters Module Level 3

Draft Standard

17 November 2020 - history

CSS Scroll Anchoring Module Level 1

Draft Standard

11 November 2020 - history

Resize Observer

Draft Standard

11 February 2020 - history

CSS Writing Modes Level 3

Standard

10 December 2019 - history

CSS Writing Modes Level 4

Candidate Standard

30 July 2019 - history

CSS Spatial Navigation Level 1

Draft Standard

26 November 2019 - history

CSS Overscroll Behavior Module Level 1

Draft Standard

6 June 2019 - history

CSS Fragmentation Module Level 4

Draft Standard

18 December 2018 - history

CSS Fragmentation Module Level 3

Candidate Standard

4 December 2018 - history

Filter Effects Module Level 1

Draft Standard

18 December 2018 - history

CSS Layout API Level 1

Draft Standard

12 April 2018 - history

CSS Fill and Stroke Module Level 3

Draft Standard

13 April 2017 - history

CSS Round Display Level 1

Draft Standard

22 December 2016 - history

CSS Page Floats

Draft Standard

15 September 2015 - history

Priorities for CSS from the Digital Publishing Interest Group

Draft Standard

20 August 2015 - history

CSS Template Layout Module

Note

26 March 2015 - history

CSS Exclusions Module Level 1

Draft Standard

15 January 2015 - history

CSS Regions Module Level 1

Draft Standard

9 October 2014 - history

CSS Line Grid Module Level 1

Draft Standard

16 September 2014 - history

SVG Integration

Draft Standard

17 April 2014 - history

CSS Scoping Module Level 1

Draft Standard

3 April 2014 - history

CSS Namespaces Module Level 3

Standard

20 March 2014 - history

CSS Style Attributes

Standard

7 November 2013 - history

A MathML for CSS Profile

Standard

7 June 2011 - history

Associating Style Sheets with XML documents 1.0 (Second Edition)

Standard

28 October 2010 - history

CSS Techniques for Web Content Accessibility Guidelines 1.0

Note

6 November 2000 - history