PROPOSED CSS Working Group Charter

Normative Specifications

The Working Group will deliver the following W3C normative specifications:

Candidate Recommendation and above

css-2016

CSS Backgrounds and Borders Module Level 3

This document collects together into one definition all the specs that together form draft contains the current state of Cascading Style Sheets (CSS) as features of 2016. The primary audience is CSS implementers, not CSS authors, as this definition includes modules by specification stability, not Web browser adoption rate. relating to borders and backgrounds.

Draft State: state: No draft, published annually. Candidate Recommendation

Expected completion: Q4 2016 css-2017 Q2 2021

This document collects together into one definition all the specs that together form the current state of Cascading Style Sheets (CSS) as of 2017. The primary audience is CSS implementers, not Adopted Candidate Recommendation: CSS authors, as this definition includes modules by specification stability, not Web browser adoption rate. Backgrounds and Borders Module Level 3, W3C Candidate Recommendation, 17 October 2017

Draft State: Reference Candidate Recommendation: No draft, published annually. CSS Backgrounds and Borders Module Level 3, W3C Candidate Recommendation, 17 October 2017

Produced under Expected completion: Working Group Charter: Q4 2017 css-2018 https://www.w3.org/Style/2016/css-2016.html

CSS Cascading and Inheritance Level 3

This document collects together into one definition CSS module describes how to collate style rules and assign values to all the specs that together form the current state of Cascading Style Sheets (CSS) as properties on all elements. By way of 2018. The primary audience is CSS implementers, not CSS authors, as this definition includes modules by specification stability, not Web browser adoption rate. cascading and inheritance, values are propagated for all properties on all elements.

Draft State: state: No draft, published annually. Candidate Recommendation

Expected completion: Q4 Q3 2020

Adopted Candidate Recommendation: CSS Cascading and Inheritance Level 3, W3C Candidate Recommendation, 28 August 2018 css-backgrounds-3

Reference Candidate Recommendation: CSS Cascading and Inheritance Level 3, W3C Candidate Recommendation, 28 August 2018

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Cascading and Inheritance Level 4

This draft contains the features of CSS level 3 relating module describes how to borders and backgrounds. It includes collate style rules and extends the functionality of CSS level 2 [CSS21], which builds on CSS level 1. The main extensions compared assign values to level 2 are borders consisting all properties on all elements. By way of images, boxes with multiple backgrounds, boxes with rounded corners cascading and boxes with shadows. inheritance, values are propagated for all properties on all elements.

Draft State: state: CR / Stable Candidate Recommendation

Expected completion: Q3 Q1 2022

Adopted Candidate Recommendation: CSS Cascading and Inheritance Level 4, W3C Candidate Recommendation, 28 August 2018 css-conditional-3

Reference Candidate Recommendation: CSS Cascading and Inheritance Level 4, W3C Candidate Recommendation, 28 August 2018

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Conditional Rules Module Level 3

This module contains the features of CSS for conditional processing of parts of style sheets, conditioned on capabilities of the processor or the document the style sheet is being applied to. It includes and extends the functionality of

Draft state: Candidate Recommendation

Expected completion: Q4 2020

Adopted Candidate Recommendation: CSS level 2, which builds on Conditional Rules Module Level 3, W3C Candidate Recommendation, 4 April 2013

Reference Draft: CSS level 1. Conditional Rules Module Level 3, W3C Working Draft, 13 December 2012

Produced under Working Group Charter: http://www.w3.org/2010/09/CSSWG/charter

CSS Flexible Box Layout Module Level 1

The main extensions compared to level 2 are allowing nesting of certain at-rules inside '@media', and the addition of the '@supports' rule specification describes a CSS box model optimized for conditional processing. user interface design.

Draft State: state: CR / Stable Candidate Recommendation

Expected completion: Q1 Q2 2020

Adopted Candidate Recommendation: CSS Flexible Box Layout Module Level 1, W3C Candidate Recommendation, 19 November 2018 css-multicol-1

Reference Candidate Recommendation: CSS Flexible Box Layout Module Level 1, W3C Candidate Recommendation, 8 November 2018

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Image Values and Replaced Content Module Level 3

This specification describes multi-column layouts in CSS, a style sheet language for the web. Using functionality described in module contains features relating to the specification, content can be flowed into multiple columns with a gap <image> type and a rule between them. replaced elements.

Draft State: state: CR / Stable Candidate Recommendation

Expected completion: Q2 2022

Adopted Candidate Recommendation: CSS Image Values and Replaced Content Module Level 3, W3C Candidate Recommendation, 17 April 2012

Reference Draft: CSS Image Values and Replaced Content Module Level 3, W3C Working Draft, 12 January 2012

Produced under Working Group Charter: http://www.w3.org/2010/09/CSSWG/charter

css-values-3 CSS Values and Units Module Level 3

This CSS3 CSS module describes the common values and units that CSS properties accept and the syntax used for describing them in CSS property definitions.

Draft State: state: CR / Stable Candidate Recommendation

Expected completion: Q4 2018 css-cascade-3 Q2 2020

This Adopted Candidate Recommendation: CSS module describes how to collate style rules and assign values to all properties on all elements. By way of cascading Values and inheritance, values are propagated for all properties on all elements. Units Module Level 3, W3C Candidate Recommendation, 6 June 2019

Draft State: Reference Draft: CR / Stable CSS Values and Units Module Level 3, W3C Candidate Recommendation, 6 June 2019

Produced under Expected completion: Working Group Charter: Q4 2017 https://www.w3.org/Style/2016/css-2016.html

css-variables-1 CSS Custom Properties for Cascading Variables Module Level 1

This module introduces cascading variables as a new primitive value type that is accepted by all CSS properties, and custom properties for defining them.

Draft State: state: CR / Refining Candidate Recommendation

Expected completion: Q1 2017 css-images-3 Q2 2020

This module contains the features of CSS level 3 relating to the <image> type and replaced elements. It includes and extends the functionality of Adopted Candidate Recommendation: CSS level 2. The main extensions compared to CSS2.1 are the generalization of the <url> type to the <image> type, several additions to the <image> type, a generic sizing algorithm for images and other replaced content in CSS, definitions Custom Properties for interpolating several <image> types, and several properties controlling the interaction of replaced elements and CSS's layout models. Cascading Variables Module Level 1, W3C Candidate Recommendation, 03 December 2015

Draft State: Reference Candidate Recommendation: CR / Testing css-flexbox-1 The specification describes a CSS box model optimized Custom Properties for user interface design. In the flex layout model, the children of a flex container can be laid out in any direction, and can “flex” their sizes, either growing to fill unused space or shrinking Cascading Variables Module Level 1, W3C Candidate Recommendation, 03 December 2015

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

Media Queries Level 4

Media Queries allow authors to avoid overflowing the parent. Both horizontal test and vertical alignment query values or features of the children can be easily manipulated. Nesting of these boxes (horizontal inside vertical, user agent or vertical inside horizontal) can be display device, independent of the document being rendered. They are used in the CSS @media rule to build layouts conditionally apply styles to a document, and in two dimensions. various other contexts and languages, such as HTML and JavaScript.

Draft State: state: CR / Testing Candidate Recommendation

Expected completion: Q3 2017 css-text-decor-3 Q2 2022

This module contains the features of CSS relating to text decoration, such as underlines, text shadows, and emphasis marks. Adopted Candidate Recommendation: Media Queries Level 4, W3C Candidate Recommendation, 5 September 2017

Draft State: Reference Candidate Recommendation: CR / testing css-fonts-3 Media Queries Level 4, W3C Candidate Recommendation, 5 September 2017

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

Compositing and Blending Level 1

This CSS3 module Compositing describes how font properties are specified and how font resources are loaded dynamically. The contents shapes of this specification different elements are a consolidation of content previously divided into CSS3 Fonts and CSS3 Web Fonts modules. The description of font load events was moved combined into the CSS3 Font Load Events module. a single image.

Draft State: state: CR / testing Candidate Recommendation

Expected completion: Q2 2019 Q3 2020

Adopted Candidate Recommendation: Compositing and Blending Level 1, W3C Candidate Recommendation, 13 January 2015

Reference Candidate Recommendation: Compositing and Blending Level 1, W3C Candidate Recommendation, 13 January 2015

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

css-writing-modes-3 CSS Writing Modes Level 3

CSS Writing Modes Level 3 defines CSS support for various international writing modes, such as modes and their combinations, including left-to-right (e.g. Latin or Indic), right-to-left (e.g. Hebrew or Arabic), bidirectional (e.g. mixed Latin and Arabic) right-to-left text ordering as well as horizontal and vertical (e.g. Asian scripts). orientations.

Draft State: state: CR / Testing Candidate Recommendation

Expected completion: Q2 2017 css-shapes-1 2020

Adopted Candidate Recommendation: CSS Shapes describe geometric shapes for use in CSS. For Writing Modes Level 1, CSS Shapes can be applied to floats. A circle shape on a float will cause inline content to wrap around the circle shape instead of the float's bounding box. 3, W3C Candidate Recommendation, 30 July 2019

Draft State: Reference Candidate Recommendation: CR / Testing css-masking-1 CSS Writing Modes Level 3, W3C Candidate Recommendation, 30 July 2019

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Writing Modes Level 4

CSS Masking provides two means Writing Modes Level 4 defines CSS support for partially or fully hiding portions of visual elements: masking various writing modes and clipping. their combinations, including left-to-right and right-to-left text ordering as well as horizontal and vertical orientations.

Draft State: state: CR / Testing css-counter-styles-3 Candidate Recommendation

This module introduces the ''@counter-style'' rule, which allows authors to define their own custom counter styles for use with Adopted Candidate Recommendation: CSS list-marker and generated-content counters. It also predefines a set of common counter styles, including the ones present in CSS2 and CSS2.1. Writing Modes Level 4, W3C Candidate Recommendation, 30 July 2019

Draft State: Reference Candidate Recommendation: CR / Testing CSS Writing Modes Level 4, W3C Candidate Recommendation, 30 July 2019

Produced under Expected completion: Working Group Charter: Q2 2018 https://www.w3.org/Style/2016/css-2016.html

css-break-3 CSS Fragmentation Module Level 3

This module describes the fragmentation model that partitions a flow into pages, columns, or regions. It builds on the Page model module and introduces and defines the fragmentation model. It adds functionality for pagination, breaking variable fragment size and orientation, widows and orphans.

Draft State: state: CR / Testing compositing-1 Candidate Recommendation

Compositing describes how shapes of different elements are combined into a single image. There are various possible approaches for compositing. Previous versions of SVG and Adopted Candidate Recommendation: CSS used Simple Alpha Compositing. In this model, each element is rendered into its own buffer and is then merged with its backdrop using the Porter Duff source-over operator. Fragmentation Module Level 3, W3C Candidate Recommendation, 4 December 2018

Draft State: Reference Draft: CR / Testing CSS Fragmentation Module Level 3, W3C Candidate Recommendation, 4 December 2018

Produced under Expected completion: Working Group Charter: Q2 2019 css-syntax-3 https://www.w3.org/Style/2016/css-2016.html

CSS Containment Module Level 1

This CSS module describes, in general terms, describes the basic structure and syntax of CSS stylesheets. It defines, in detail, contain property, which indicates that the syntax and parsing element’s subtree is independent of CSS - how to turn a stream the rest of bytes into a meaningful stylesheet. the page.

Draft State: state: CR / Testing Candidate Recommendation

Expected completion: Adopted Candidate Recommendation: Q1 CSS Containment Module Level 1, W3C Candidate Recommendation, 30 April 2019 css-ui-3

Reference Candidate Recommendation: CSS Containment Module Level 1, W3C Candidate Recommendation, 30 April 2019

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Counter Styles Level 3

This specification describes user interface related properties and values that are proposed for CSS level 3 to style HTML and XML (including XHTML). It includes and extends user interface related features from module introduces the properties and values of @counter-style rule, which allows authors to define their own custom counter styles for use with CSS level 2 revision 1. It uses various properties list-marker and values to style basic user interface elements in a document. generated-content counters.

Draft State: state: CR / Testing geometry-1 Candidate Recommendation

This specification provides basic geometric interfaces to represent points, rectangles, quadrilaterals and transformation matrices that can be used by other modules or specifications. Adopted Candidate Recommendation: CSS Counter Styles Level 3, W3C Candidate Recommendation, 14 December 2017

Draft State: Reference Candidate Recommendation: CR / Testing css-cascade-4 CSS Counter Styles Level 3, W3C Candidate Recommendation, 14 December 2017

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Display Module Level 3

This CSS module describes how to collate style rules and assign values to all properties on all elements. By way of cascading and inheritance, values are propagated for all properties on all elements. New in this level are the ''revert'' keyword CSS formatting box tree is generated from the document element tree and <supports-condition> for defines the ''@import'' rule. display property that controls it.

Draft State: state: CR / Testing Candidate Recommendation

Expected completion: Adopted Candidate Recommendation: Q2 2018 css-will-change-1 CSS Display Module Level 3, W3C Candidate Recommendation, 11 July 2019

Reference Candidate Recommendation: CSS Display Module Level 3, W3C Candidate Recommendation, 11 July 2019

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Easing Functions Level 1

This document defines the 'will-change' CSS property, which allows an author module describes a way for authors to inform define a transformation that controls the UA ahead of time of what kinds rate of changes they are likely to make to an element. This allows the UA to optimize how they handle the element ahead change of time, performing potentially-expensive work preparing for an animation before the animation actually begins. some value.

Draft State: state: CR / Testing Candidate Recommendation

Adopted Candidate Recommendation: CSS 2.2 Easing Functions Level 1, W3C Candidate Recommendation, 30 April 2019

This is an updated version of Reference Candidate Recommendation: CSS 2.1, including errata, removing sections which are obsoleted by later levels of Easing Functions Level 1, W3C Candidate Recommendation, 30 April 2019

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS and ponting to their replacements. Grid Layout Module Level 1

This CSS module defines a two-dimensional grid-based layout system, optimized for user interface design.

Draft state: WD / Refining Candidate Recommendation

Expected completion: Adopted Candidate Recommendation: Q4 CSS Grid Layout Module Level 1, W3C Candidate Recommendation, 14 December 2017 css-animations-1

Reference Candidate Recommendation: CSS Grid Layout Module Level 1, W3C Candidate Recommendation, 14 December 2017

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Scroll Snap Module Level 1

This CSS module describes a way for authors contains features to animate the values of CSS properties over time, using keyframes. The behavior of these keyframe animations can be controlled by specifying their duration, number of repeats, control panning and repeating behavior. scrolling behavior with “snap positions”.

Draft state: Candidate Recommendation

Adopted Candidate Recommendation: CSS Scroll Snap Module Level 1, W3C Candidate Recommendation, 19 March 2019

Reference Candidate Recommendation: CSS Scroll Snap Module Level 1, W3C Candidate Recommendation, 31 January 2019

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Shapes Module Level 1

CSS Shapes describe geometric shapes for use in CSS.

Draft State: state: WD / Refining web-animations Candidate Recommendation

Adopted Candidate Recommendation: CSS Shapes Module Level 1, W3C Candidate Recommendation, 20 March 2014

Reference Draft: CSS Shapes Module Level 1, W3C Last Call Working Draft, 11 February 2014

Produced under Working Group Charter: https://www.w3.org/2010/09/CSSWG/charter

CSS Syntax Module Level 3

This specification defines a model for synchronization and timing of changes to module describes, in general terms, the presentation of a Web page. This specification also defines an application programming interface for interacting with this model basic structure and it is expected that further specifications will define declarative means for exposing these features. syntax of CSS stylesheets.

Draft State: state: ED / Refining css-text-3 Candidate Recommendation

Adopted Candidate Recommendation: CSS Syntax Module Level 3, W3C Candidate Recommendation, 16 July 2019

Reference Draft: CSS Syntax Module Level 3, W3C Candidate Recommendation, 16 July 2019

Produced under Working Group Charter : https://www.w3.org/Style/2016/css-2016.html

CSS Text Decoration Module Level 3

This CSS3 module defines properties for contains the features of CSS relating to text manipulation and specifies their processing model. It covers line breaking, justification and alignment, white space handling, and decoration, such as underlines, text transformation. shadows, and emphasis marks.

Draft State: state: LC / Refining css-transforms Candidate Recommendation

Adopted Candidate Recommendation: CSS Text Decoration Module Level 3, W3C Candidate Recommendation, 13 August 2019

Reference Candidate Recommendation: CSS Text Decoration Module Level 3, W3C Candidate Recommendation, 13 August 2019

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Transforms Module Level 1

CSS transforms allows elements styled with CSS to be transformed in two-dimensional or three-dimensional space.

Draft state: Candidate Recommendation

Adopted Candidate Recommendation: CSS Transforms Module Level 1, W3C Candidate Recommendation, 14 February 2019

Reference Candidate Recommendation: CSS Transforms Module Level 1, W3C Candidate Recommendation, 14 February 2019

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Will Change Module Level 1

This specification module introduces cascading variables as a new primitive value type that is the convergence accepted by all CSS properties, and custom properties for defining them.

Draft state: Candidate Recommendation

Adopted Candidate Recommendation: CSS Will Change Module Level 1, W3C Candidate Recommendation, 03 December 2015

Reference Candidate Recommendation: CSS Will Change Module Level 1, W3C Candidate Recommendation, 03 December 2015

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

CSS Masking Module Level 1

CSS Masking provides two means for partially or fully hiding portions of the visual elements: masking and clipping.

Draft state: Candidate Recommendation

Adopted Candidate Recommendation: CSS 2D transforms, Masking Module Level 1, W3C Candidate Recommendation, 26 August 2014

Reference Draft: CSS 3D transforms Masking Module Level 1, W3C Last Call Working Draft, 22 May 2014

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

Geometry Interfaces Module Level 1

This specification provides basic geometric interfaces to represent points, rectangles, quadrilaterals and SVG transforms transformation matrices that can be used by other modules or specifications.

Draft State: state: WD / Refining css-transitions-1 Candidate Recommendation

Adopted Candidate Recommendation: Geometry Interfaces Module Level 1, W3C Candidate Recommendation, 4 December 2018

Reference Candidate Recommendation: Geometry Interfaces Module Level 1, W3C Candidate Recommendation, 4 December 2018

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Transitions allows property changes in CSS values Painting API Level 1

An API for allowing web developers to occur smoothly over define a specified duration. custom CSS <image> with javascript, which will respond to style and size changes.

Draft state: Candidate Recommendation

Adopted Candidate Recommendation: CSS Painting API Level 1, W3C Candidate Recommendation, 9 August 2018

Reference Candidate Recommendation: CSS Painting API Level 1, W3C Candidate Recommendation, 9 August 2018

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

Working Draft State:

CSS Text Decoration Module Level 4

This module contains the features of CSS relating to text decoration, such as underlines, text shadows, and emphasis marks.

Draft state: WD / Refining css-box-3 First Public Working Draft

Adopted Working Draft: CSS Text Decoration Module Level 4, W3C First Public Working Draft, 13 March 2018

Reference Draft: CSS Text Decoration Module Level 4, W3C First Public Working Draft, 13 March 2018

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Box Alignment Module Level 3

This module contains the features of CSS relating to the alignment of boxes within their containers in the various CSS box layout models: block layout, table layout, flex layout, and grid layout.

Draft State: state: WD / Refining css-grid-1 Working Draft

Adopted Working Draft: CSS Box Alignment Module Level 3, W3C Working Draft, 6 December 2018

Reference Draft: CSS Box Alignment Module Level 3, W3C Working Draft, 18 December 2014

Produced under Working Group Charter: https://www.w3.org/2010/09/CSSWG/charter

CSS Animations Level 1

This CSS module defines describes a two-dimensional grid-based layout system, optimized way for user interface design. In the grid layout model, authors to animate the children values of a grid container can be positioned into arbitrary slots in a predefined flexible or fixed-size layout grid. CSS properties over time, using keyframes.

Draft State: state: WD / Refining css-page-3 Working Draft

Adopted Working Draft: CSS Animations Level 1, W3C Working Draft, 11 October 2018

Reference Draft: CSS Animations Module Level 3, W3C Working Draft, 20 March 2009

Produced under Working Group Charter: https://www.w3.org/Style/2008/css-charter.html

CSS Box Model Module Level 3

This specification describes the margin and padding properties.

Draft state: Working Draft

Adopted Working Draft: CSS Box Model Module Level 3, W3C Working Draft, 18 December 2018

Reference Draft: CSS3 module: The box model, W3C Working Draft, 24 October 2002

Produced under Working Group Charter: http://www.w3.org/Style/2004/css-charter-long

CSS Fragmentation Module Level 4

This module specifies how pages are generated and laid out to hold fragmented content in describes the fragmentation model that partitions a paged presentation. flow into pages, columns, or regions. It builds on the Page model module and introduces and defines the fragmentation model. It adds functionality for controlling page margins, page pagination, breaking variable fragment size and orientation, widows and headers and footers, and extends generated content to enable page numbering and running headers / footers. The process of paginating a flow into such generated pages is covered in css-break-3. orphans.

Draft State: state: WD / Revising cssom-view-1 First Public Working Draft

The APIs introduced by this specification provide authors with a way to inspect and manipulate the visual view of a document. This includes getting the position of element layout boxes, obtaining the width of the viewport through script, and also scrolling an element. Adopted Working Draft: CSS Fragmentation Module Level 3, W3C First Public Working Draft, 18 December 2018

Draft State: Reference Draft: WD / Revising selectors-4 CSS Fragmentation Module Level 3, W3C First Public Working Draft, 18 December 2018

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Color Module Level 4

Selectors are patterns that match against elements in a tree, This specification describes CSS <color> values, and as such form one of several technologies that can be used to select nodes in an XML document. Selectors have been optimized properties for use with HTML and XML, foreground color and are designed to be usable in performance-critical code. They are a core component of group opacity.

Draft state: Working Draft

Adopted Working Draft: CSS (Cascading Style Sheets), which uses Selectors to bind style properties to elements in the document. Color Module Level 4, W3C Working Draft, 5 March 2019

Draft State: Reference Draft: WD / Revising css-sizing-3 CSS Color Module Level 4, W3C First Public Working Draft, 05 July 2016

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

CSS Color Adjustment Module Level 1

This module extends the CSS sizing properties with keywords that represent content-based "intrinsic" sizes introduces a model and context-based "extrinsic" sizes, allowing CSS controls over automatic color adjustment by the user agent to more easily describe boxes that fit their content handle user preferences, such as "Dark Mode", contrast adjustment, or fit into a particular layout context. specific desired color schemes.

Draft State: state: WD / Revising css-overflow-3 Working Draft

This module contains the features of Adopted Working Draft: CSS relating to scrollable overflow handling in visual media. Color Adjustment Module Level 1, W3C Working Draft, 23 May 2019

Draft State: Reference Draft: WD / Revising css-display-3 CSS Color Adjustment Module Level 1, W3C Working Draft, 23 May 2019

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Generated Content Module Level 3

This module describes how the CSS formatting box tree is generated from the document element tree and defines the 'display' and 'box-suppress' properties that control it. to insert content in a document.

Draft State: state: WD / Revising css-scroll-snap-1 Working Draft

This module contains features to control panning and scrolling behavior with “snap positions”. Adopted Working Draft: CSS Generated Content Module Level 3, W3C Working Draft, 10 July 2019

Draft State: Reference Draft: WD / Revising css-pseudo-4 CSS3 Generated and Replaced Content Module, W3C Working Draft, 14 May 2003

Produced under Working Group Charter: https://www.w3.org/Style/2004/css-charter-long

CSS Grid Layout Module Level 2

This CSS module defines pseudo-elements, abstract elements that represent portions of the a two-dimensional grid-based layout system, optimized for user interface design.

Draft state: Working Draft

Adopted Working Draft: CSS render tree that can be selected and styled. Grid Layout Module Level 2, W3C Working Draft, 04 August 2018

Draft State: Reference Draft: WD / Exploring CSS Grid Layout Module Level 2, First Public Working Draft, 06 February 2018

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

css-device-adapt-1 CSS Device Adaptation Module Level 1

This specification provides a way for an author to specify, in CSS, the size, zoom factor, and orientation of the viewport that is used as the base for the initial containing block.

Draft State: state: WD / Exploring css-exclusions-1 Working Draft

Adopted Working Draft: CSS Device Adaptation Module Level 1, W3C Working Draft, 29 March 2016

Reference Draft: CSS Device Adaptation Module Level 1, W3C Working Draft, 29 March 2016

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

CSS Exclusions Module Level 1

CSS Exclusions define arbitrary areas around which inline content can flow.

Draft state: Working Draft

Adopted Working Draft: CSS Exclusions can be defined on any CSS block-level elements. Module Level 1, W3C Working Draft, 15 January 2015

Reference Draft: CSS Exclusions extend the notion of content wrapping previously limited to floats. Module Level 1, W3C Working Draft, 15 January 2015

Produced under Working Group Charter: http://www.w3.org/2010/09/CSSWG/charter

CSS Font Loading Module Level 3

This CSS module describes events and interfaces used for dynamically loading font resources.

Draft State: state: WD / Exploring filter-effects Last Call Working Draft

Filter effects are a way of processing an element’s rendering before it is displayed in the document. Typically, rendering an element via Adopted Working Draft: CSS or SVG can be conceptually described as if the element, including its children, Font Loading Module Level 3, W3C Last Call Working Draft, 22 May 2014

Reference Draft: CSS Font Loading Module Level 3, W3C Last Call Working Draft, 22 May 2014

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

CSS Fonts Module Level 4

This module describes how font properties are drawn into a buffer (such as a raster image) specified and then that buffer is composited into the elements parent. Filters apply an effect before the compositing stage. Examples of such effects how font resources are blurring, changing color intensity and warping the image. loaded dynamically.

Draft State: state: ED / Exploring Working Draft

Adopted Working Draft: CSS Fonts Module Level 4, W3C Working Draft, 20 September 2018

Reference Draft: CSS Fonts Module Level 4, W3C Working Draft, 11 July 2017

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

css-gcpm-3 CSS Generated Content for Paged Media Module

Books and other paged media often use special techniques to display information. Content may be moved to or This module defines generated content for special areas of the page, such as running heads or footnotes. paged media.

Draft state: Working Draft

Adopted Working Draft: CSS Generated content within pages, such as tab leaders or cross-references, helps readers navigate within and between pages. Content for Paged Media Module, W3C Working Draft, 13 May 2014

Draft State: Reference Draft: WD / Exploring css-page-floats-3 CSS3 module: Generated Content for Paged Media, W3C Working Draft, 12 June 2006

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

CSS Image Values and Replaced Content Module Level 4

This document describes floats that move module contains features relating to the top or bottom <image> type and replaced elements.

Draft state: Working Draft

Adopted Working Draft: CSS Image Values and Replaced Content Module Level 4, W3C Working Draft, 13 April 2017

Reference Draft: CSS Image Values and Replaced Content Module Level 4, W3C Working Draft, 11 September 2012

Produced under Working Group Charter: http://www.w3.org/2010/09/CSSWG/charter

CSS Inline Layout Module Level 3

The CSS formatting model provides for a flow of content passages. This feature has traditionally been used in print publications in which figures elements and photos are moved to the top or bottom text inside of columns or pages, along with their captions. This draft describes how a container to achieve this effects for floats within pages, columns, regions and elements. be wrapped into lines.

Draft State: state: FPWD / Exploring Working Draft

Adopted Working Draft: CSS Inline Layout Module Level 3, W3C Working Draft, 8 August 2018

Reference Draft: CSS Inline Layout Module Level 3, W3C Working Draft, 18 December 2014

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

css-line-grid-1 CSS Line Grid Module Level 1

This module contains CSS features for aligning content to a baseline grid.

Draft State: state: WD / Exploring Working Draft

Adopted Working Draft: CSS Line Grid Module Level 1, W3C Working Draft, 16 September 2014

Reference Draft: CSS Line Grid Module Level 1, W3C First Public Working Draft, 3 April 2014

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

css-lists-3 CSS Lists Module Level 3

This draft module contains CSS features related to list counters: styling them, positioning them, and manipulating their value.

Draft state: Working Draft

Adopted Working Draft: CSS Lists Module Level 3, W3C Working Draft, 25 April 2019

Reference Draft: CSS Lists and Counters Module Level 3, W3C Working Draft, 24 May 2011

Produced under Working Group Charter: https://www.w3.org/Style/2004/css-charter-long

CSS Logical Properties and Values Level 1

This module introduces logical properties and values that provide the author with the ability to control layout through logical, rather than physical, direction and dimension mappings.

Draft state: Working Draft

Adopted Working Draft: CSS Logical Properties and Values Level 1, W3C Working Draft, 27 August 2018

Reference Draft: CSS Logical Properties and Values Level 1, W3C First Public Working Draft, 18 May 2017

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Multi-column Layout Module Level 1

This specification describes multi-column layouts in CSS.

Draft state: Working Draft

Adopted Working Draft: CSS Multi-column Layout Module Level 1, W3C Working Draft, 28 May 2018

Reference Draft: CSS3 module: Multi-column layout, W3C Working Draft, 30 June 2009

Produced under Working Group Charter: https://www.w3.org/Style/2008/css-charter

CSS Spatial Navigation Level 1

This specification defines a general model for navigating the focus using the arrow keys, as well as related CSS, JavaScript features and Events.

Draft state: First Public Working Draft

Adopted Working Draft: CSS Spatial Navigation Level 1, W3C First Public Working Draft, 23 April 2019

Reference Draft: CSS Spatial Navigation Level 1, W3C First Public Working Draft, 23 April 2019

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Overflow Module Level 3

This module contains the features of CSS level 3 relating to list styling. It includes and extends scrollable overflow handling in visual media.

Draft state: Working Draft

Adopted Working Draft: CSS Overflow Module Level 3, W3C Working Draft, 31 July 2018

Reference Draft: CSS Overflow Module Level 3, W3C First Public Working Draft, 18 April 2013

Produced under Working Group Charter: https://www.w3.org/2010/09/CSSWG/charter

CSS Overflow Module Level 4

This module contains the functionality features of CSS level 2. The main extensions compared relating to level 2 are new mechanisms of overflow handling in visual media (e.g., screen or paper).

Draft state: First Public Working Draft

Adopted Working Draft: CSS Overflow Module Level 4, First Public Working Draft, 13 June 2017

Reference Draft: CSS Overflow Module Level 4, First Public Working Draft, 13 June 2017

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Overscroll Behavior Module Level 1

This module defines overscroll-behavior to control the behavior when the scroll position of a pseudo-element representing scroll container reaches the list marker, edge of the scrollport.

Draft state: Working Draft

Adopted Working Draft: CSS Overscroll Behavior Module Level 1, W3C Working Draft, 31 July 2018

Reference Draft: CSS Overscroll Behavior Module Level 1, W3C First Public Working Draft, 18 April 2013

Produced under Working Group Charter: https://www.w3.org/2010/09/CSSWG/charter

CSS Paged Media Module Level 3

This CSS module specifies how pages are generated and a method for authors laid out to define their own list-styles. hold fragmented content in a paged presentation.

Draft state: Working Draft

Adopted Working Draft: CSS Paged Media Module Level 3, W3C Working Draft, 18 October 2018

Reference Draft: CSS Paged Media Module Level 3, W3C Working Draft, 14 March 2013

Produced under Working Group Charter: https://www.w3.org/Style/2004/css-charter-long

CSS Page Floats

This document describes floats that move to the top or bottom of content passages.

Draft State: state: WD / Exploring First Public Working Draft

Adopted Working Draft: CSS Page Floats, W3C First Public Working Draft, 15 September 2015

Reference Draft: CSS Page Floats, W3C First Public Working Draft, 15 September 2015

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

css-position-3 CSS Positioned Layout Module Level 3

This module contains the features of CSS level 3 relating to positioning and stacking of elements.

Draft state: Working Draft

Adopted Working Draft: CSS Positioned Layout Module Level 3, W3C Working Draft, 17 May 2016

Reference Draft: CSS Positioned Layout Module Level 3, W3C Working Draft, 17 May 2016

Produced under Working Group Charter: https://www.w3.org/2010/09/CSSWG/charter

CSS Pseudo-Elements Module Level 4

This CSS module defines pseudo-elements, abstract elements that represent portions of the CSS render tree that can be selected and styled.

Draft State: state: WD / Exploring Working Draft

Adopted Working Draft: CSS Pseudo-Elements Module Level 4, W3C Working Draft, 25 February 2019

Reference Draft: CSS Pseudo-Elements Module Level 4, W3C First Public Working Draft, 15 January 2015

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

css-regions-1 CSS Regions Module Level 1

The CSS Regions module allows content from one or more elements to flow through one or more boxes called CSS Regions, fragmented as defined in css-break-3. CSS Fragmentation Module.

Draft state: Working Draft

Adopted Working Draft: CSS Regions Module Level 1, W3C Working Draft, 9 October 2014

Reference Draft: CSS Regions Module, W3C Working Draft, 09 June 2011

Produced under Working Group Charter: https://www.w3.org/Style/2008/css-charter

CSS Rhythmic Sizing

This module also defines CSSOM contains CSS features for aligning content size to expose both the inputs and outputs multiple of this fragmentation. unit size.

Draft State: state: WD / Exploring css-ruby-1 First Public Working Draft

Adopted Working Draft: CSS Rhythmic Sizing, W3C First Public Working Draft, 2 March 2017

Reference Draft: CSS Rhythmic Sizing, W3C First Public Working Draft, 2 March 2017

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Round Display Level 1

“Ruby”, a form of interlinear annotation, are short runs of text alongside the base text. They are typically used in East Asian documents This document describes CSS extensions to indicate pronunciation or support a round display. The extensions help web authors to provide build a short annotation. web page suitable for a round display.

Draft state: Working Draft

Adopted Working Draft: CSS Round Display Level 1, W3C Working Draft, 22 December 2016

Reference Draft: CSS Round Display Level 1, W3C First Public Working Draft, 22 September 2015

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

CSS Ruby Layout Module Level 1

This module describes the rendering model and formatting controls related to displaying ruby annotations in CSS.

Draft state: Working Draft

Adopted Working Draft: CSS Ruby Layout Module Level 1, W3C Working Draft, 5 August 2014

Reference Draft: CSS3 Ruby Module, W3C Candidate Recommendation, 14 May 2003

Produced under Working Group Charter: https://www.w3.org/Style/2002/css-charter.html

CSS Scoping Module Level 1

This specification defines various scoping/encapsulation mechanisms for CSS.

Draft state: First Public Working Draft

Adopted Working Draft: CSS Scoping Module Level 1, W3C First Public Working Draft, 3 April 2014

Reference Draft: CSS Scoping Module Level 1, W3C First Public Working Draft, 3 April 2014

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

CSS Scrollbars Module Level 1

CSS Scrollbars standardizes the ability to color scrollbars.

Draft State: state: WD / Exploring First Public Working Draft

Adopted Working Draft: CSS Scrollbars Module Level 1, W3C First Public Working Draft, 25 September 2018

Reference Draft: CSS Scrollbars Module Level 1, W3C First Public Working Draft, 25 September 2018

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Shadow Parts

This specification defines the ::part() pseudo-element on shadow hosts, allowing shadow hosts to selectively expose chosen elements from their shadow tree to the outside page for styling purposes.

Draft state: First Public Working Draft

Adopted Working Draft: CSS Shadow Parts, W3C First Public Working Draft, 15 November 2018

Reference Draft: CSS Shadow Parts, W3C Candidate Recommendation, 31 January 2019

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Intrinsic & Extrinsic Sizing Module Level 3

This module extends the CSS sizing properties with keywords that represent content-based "intrinsic" sizes and context-based "extrinsic" sizes, allowing CSS to more easily describe boxes that fit their content or fit into a particular layout context.

Draft state: Working Draft

Adopted Working Draft: CSS Intrinsic & Extrinsic Sizing Module Level 3, W3C Working Draft, 22 May 2019

Reference Draft: CSS Intrinsic & Extrinsic Sizing Module Level 3, W3C Working Draft, 27 September 2012

Produced under Working Group Charter: https://www.w3.org/2010/09/CSSWG/charter

css-tables-3 CSS Table Module Level 3

This CSS module defines a two-dimensional grid-based layout system, optimized for tabular data rendering. In the table layout model, each display node is assigned

Draft state: Working Draft

Adopted Working Draft: CSS Table Module Level 3, W3C Working Draft, 7 March 2017

Reference Draft: CSS Table Module Level 3, W3C First Public Working Draft, 25 October 2016

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Text Module Level 3

This CSS module defines properties for text manipulation and specifies their processing model.

Draft state: Working Draft

Adopted Working Draft: CSS Text Module Level 3, W3C Working Draft, 12 December 2018

Reference Draft: CSS Text Module Level 3, W3C Last Call Working Draft, 10 October 2013

Produced under Working Group Charter: https://www.w3.org/2010/09/CSSWG/charter

CSS Text Module Level 4

This module defines properties for text manipulation and specifies their processing model.

Draft state: Working Draft

Adopted Working Draft: CSS Text Module Level 4, W3C Working Draft, 20 September 2018

Reference Draft: CSS Text Module Level 4, W3C First Public Working Draft, 22 September 2015

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

CSS Transitions

CSS Transitions allows property changes in CSS values to an intersection between occur smoothly over a set of consecutive rows specified duration.

Draft state: Working Draft

Adopted Working Draft: CSS Transitions, W3C Working Draft, 11 October 2018

Reference Draft: CSS Transitions Module Level 3, W3C Working Draft, 20 March 2009

Produced under Working Group Charter: https://www.w3.org/Style/2008/css-charter

CSS Basic User Interface Module Level 4

This specification describes user interface related properties and a set of consecutive columns, themselves generated values to style HTML and XML (including XHTML). It includes and extends user interface related features from the table structure properties and sized according values of previous CSS levels. It uses various properties and values to their content. style basic user interface elements in a document.

Draft state: Working Draft

Adopted Working Draft: CSS Basic User Interface Module Level 4, W3C Working Draft, 22 December 2017

Reference Draft: CSS Basic User Interface Module Level 4, W3C First Public Working Draft, 22 September 2015

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

CSS Values and Units Module Level 4

This CSS module describes the common values and units that CSS properties accept and the syntax used for describing them in CSS property definitions.

Draft State: state: ED / Exploring Working Draft

Adopted Working Draft: CSS Values and Units Module Level 4, W3C Working Draft, 31 January 2019

Reference Draft: CSS Values and Units Module Level 4, W3C First Public Working Draft, 14 August 2018

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS 2.2

CSS 2.2 is derived from and is intended to replace the CSS 2.1 and CSS2 (1998) specifications.

Draft state: First Public Working Draft

Adopted Working Draft: Cascading Style Sheets Level 2 Revision 2 (CSS 2.2) Specification, W3C First Public Working Draft, 12 April 2016

Reference Draft: Cascading Style Sheets Level 2 Revision 2 (CSS 2.2) Specification, W3C First Public Working Draft, 12 April 2016

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

cssom-1 CSS Object Model (CSSOM)

CSSOM defines APIs (including generic parsing and serialization rules) for Media Queries, Selectors, and of course CSS itself.

Draft State: state: WD / Exploring css-font-loading-3 Working Draft

This Adopted Working Draft: CSS module describes events and interfaces used for dynamically loading font resources. Object Model (CSSOM), W3C Working Draft, 17 March 2016

Draft State: Reference Draft: LC / Exploring css-scoping-1 This specification defines various scoping/encapsulation mechanisms for CSS, including scoped styles and the ''@scope'' rule, Shadow DOM selectors, and page/region-based styling. CSS Object Model (CSSOM), W3C Working Draft, 17 March 2016

Produced under Draft State: Working Group Charter: FPWD / Exploring mediaqueries-4 https://www.w3.org/Style/2014/css-charter

CSSOM View Module

Media Queries allow The APIs introduced by this specification provide authors with a way to test inspect and query values or features of manipulate the user agent or display device, independent visual view of the document being rendered. They are used in the CSS @media rule to conditionally apply styles to a document, and in various other contexts and languages, such as HTML and Javascript. Media Queries Level 4 describes document. This includes getting the mechanism and syntax position of media queries, media types, and media features. It extends and supersedes element layout boxes, obtaining the features defined in Media Queries Level 3. width of the viewport through script, and also scrolling an element.

Draft State: state: WD / Exploring selectors-nonelement-1 Working Draft

Adopted Working Draft: CSSOM View Module, W3C Working Draft, 17 March 2016

Reference Draft: CSSOM View Module, W3C Working Draft, 17 March 2016

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

Selectors Level 4

Non-element Selectors extends selectors-4 and allows selecting other kinds of document nodes than elements. This is useful when selectors are used as patterns that match against elements in a general document query language. Non-element Selectors are not intended to tree, and as such form one of several technologies that can be used to select nodes in CSS, but only as a separate query language in other host environments. document.

Draft State: state: ED / Exploring css-inline-3 Working Draft

Adopted Working Draft: Selectors Level 4, W3C Working Draft, 21 November 2018

Reference Draft: Selectors Level 4, W3C Working Draft, 29 September 2011

Produced under Working Group Charter: https://www.w3.org/Style/2008/css-charter

Web Animations

The CSS formatting This specification defines a model provides for a flow of elements synchronization and text inside timing of a container changes to be wrapped into lines. The formatting the presentation of elements and text within a line, its positioning in the inline progression direction, Web page. This specification also defines an application programming interface for interacting with this model and the breaking of lines are described in css-text-3. it is expected that further specifications will define declarative means for exposing these features.

Draft state: Working Draft

Adopted Working Draft: Web Animations, W3C Working Draft, 11 October 2018

Reference Draft: Web Animations, W3C Working Draft, 7 July 2015

Produced under Working Group Charter: https://www.w3.org/2010/09/CSSWG/charter

CSS Fill and Stroke Module Level 3

This module describes the positioning in contains the block progression direction both features of elements CSS relating to filling and stroking text within lines and of the lines themselves. This positioning is often relative to SVG shapes.

Draft state: First Public Working Draft

Adopted Working Draft: CSS Fill and Stroke Module Level 3, W3C First Public Working Draft, 13 April 2017

Reference Draft: CSS Fill and Stroke Module Level 3, W3C First Public Working Draft, 13 April 2017

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

Filter Effects Module Level 1

Filter effects are a baseline. It also describes special features for formatting way of first lines and drop caps. It extends on the model processing an element’s rendering before it is displayed in CSS2. the document.

Draft State: state: WD / Revising Working Draft

Adopted Working Draft: Filter Effects Module Level 1, W3C Working Draft, 18 December 2018

Reference Draft: Filter Effects 1.0, W3C Working Draft, 25 October 2012

Produced under Working Group Charter: https://www.w3.org/2010/09/CSSWG/charter

motion-1 Motion Path Module Level 1

Motion paths allow path allows authors to animate position any graphical object and animate it along an author specified path.

Draft State: state: FPWD / Exploring css-round-display-1 Working Draft

This document describes CSS extensions to support a round display. The extensions help web authors to build a web page suitable for a round display. Adopted Working Draft: Motion Path Module Level 1, W3C Working Draft, 18 December 2018

Draft State: Reference Draft: WD / Exploring css-ui-4 Motion Path Module Level 1, W3C First Public Working Draft, 9 April 2015

This specification describes user interface related properties and values to style HTML and XML (including XHTML). It includes and extends user interface related features from the properties and values of previous Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

CSS levels. It uses various properties and values Animation Worklet API

The Animation Worklet API provides a method to style basic user interface elements in create scripted animations that control a document. set of animation effects.

Draft State: state: FPWD / Exploring css-text-4 First Public Working Draft

This module defines properties for text manipulation and specifies their processing model. It covers line breaking, justification and alignment, white space handling, and text transformation. Adopted Working Draft: CSS Animation Worklet API, W3C First Public Working Draft, 25 June 2019

Draft State: Reference Draft: FPWD / Exploring css-paint-api-1 CSS Animation Worklet API, W3C First Public Working Draft, 25 June 2019

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

CSS Layout API Level 1

This specification describes an API which allows developers to paint layout a part of an box in response to geometry / computed style changes with an additional <image> function. and box tree changes.

Draft State: state: FPWD / Exploring First Public Working Draft

Adopted Working Draft: CSS Layout API Level 1, W3C First Public Working Draft, 12 April 2018

Reference Draft: CSS Layout API Level 1, W3C First Public Working Draft, 12 April 2018

Produced under Working Group Charter: https://www.w3.org/Style/2016/css-2016.html

css-properties-values-api-1 CSS Properties and Values API Level 1

This CSS module defines an API for registering new CSS properties. Properties registered using this API are provided with a parse syntax that defines a type, inheritance behaviour, and an initial value.

Draft State: state: FPWD / Exploring css-typed-om-1/ Working Draft

Adopted Working Draft: CSS Properties and Values API Level 1, W3C Working Draft, 9 November 2017

Reference Working Draft: CSS Properties and Values API Level 1, W3C First Public Working Draft, 07 June 2016

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

CSS Typed OM Level 1

Converting CSSOM value strings into meaningfully typed JavaScript representations and back can incur a significant performance overhead. This specification exposes CSS values as typed JavaScript objects to facilitate their performant manipulation.

Draft State: state: FPWD / Exploring Working Draft

Adopted Working Draft: CSS Typed OM Level 1, W3C Working Draft, 10 April 2018

Reference Working Draft: CSS Typed OM Level 1, W3C First Public Working Draft, 07 June 2016

Produced under Working Group Charter: https://www.w3.org/Style/2014/css-charter

worklets-1 Worklets Level 1

This specification defines an API for running scripts in stages of the rendering pipeline independent of the main javascript execution environment.

Draft State: state: FPWD / Exploring css-color-4 This specification describes CSS <color> values and properties for foreground color and group opacity. First Public Working Draft State: FPWD / Exploring CSS Layout API Level 1 The layout stage of CSS is responsible for generating and positioning fragments from a tree of boxes. This specification describes an API which allows developers to layout a box in response to computed style and box tree changes.

Draft State: Adopted Working Draft: FPWD / Exploring Box Tree API Worklets Level 1 Layout as described by CSS produces boxes that control how content is displayed and positioned. This specification describes an API for accessing information about these boxes. 1, W3C Working Draft, 07 June 2016

Draft State: Reference Working Draft: FPWD / Exploring Font Metrics API Worklets Level 1 The API exposed by this specification is designed to provide basic font metrics for both in-document and out-of-document content. 1, W3C Working Draft, 07 June 2016

Produced under Draft State: Working Group Charter: FPWD / Exploring https://www.w3.org/Style/2014/css-charter

The expected completion dates listed above assume not only progress in specification and implementation work, but also in testing work. While the first two are expected to progress at a steady pace, testing has historically been understaffed. In order to avoid delaying specifications reaching the REC stage, Members are encouraged to commit resources to the testing effort. Failure to do so may make it difficult for specifications to progress beyond CR, even when they are being implemented and generally interoperable. Deliverables without an estimated date may lack tests, test results, implementations, or may require additional editing effort. Dates may be assigned if additional editing or testing resources are identified. Maintenance of existing CSS Recommendations (gathering of errata, publication of new editions incorporating errata) is also in scope.

Other Deliverables

css-2019

Other non-normative documents may be created such as: This document collects together into one definition all the specs that together form the current state of Cascading Style Sheets (CSS) as of 2019. The primary audience is CSS implementers, not CSS authors, as this definition includes modules by specification stability, not Web browser adoption rate.

Use case and requirement documents; Test suite and implementation report for

Draft state: No draft, published annually.

Expected completion: Q4 2019

css-2020

This document collects together into one definition all the specification; Primer or Best Practice documents to support web developers when designing applications. specs that together form the current state of Cascading Style Sheets (CSS) as of 2020. The primary audience is CSS implementers, not CSS authors, as this definition includes modules by specification stability, not Web browser adoption rate.

Draft state: No draft, published annually.

Expected completion: Q4 2020

css-2021

This document collects together into one definition all the specs that together form the current state of Cascading Style Sheets (CSS) as of 2021. The primary audience is CSS implementers, not CSS authors, as this definition includes modules by specification stability, not Web browser adoption rate.

Draft state: No draft, published annually.

Expected completion: Q4 2021

Timeline

• Q1 2017: 2020: REC for CSS Variables Writing Modes Level 1 3
• Q2 2017: 2020: REC for Writing Modes CSS Values and Units Module Level 3
• Q3 2017: Q2 2020: REC for CSS Custom Properties for Cascading Variables Module Level 1
• Q2 2020: REC for CSS Flexible Box Layout Module Level 1
• Q4 2017: Q3 2020: REC for CSS Cascading and Inheritance Level 3
• Q4 2017: Q3 2020: REC for CSS 2.2 Compositing and Blending Level 1
• Q1 2018: Q4 2020: REC for CSS Conditional Rules Module Level 3
• Q2 2018: 2021: REC for Counter Styles CSS Backgrounds and Borders Module Level 3
• Q2 2018: Q1 2022: REC for CSS Cascading and Inheritance Level 4
• Q3 2018: Q2 2022: REC for Backgrounds CSS Image Values and Borders Replaced Content Module Level 3
• Q4 2018: Q2 2022: REC for Values and Units Media Queries Level 3 4
Q1 2019: REC