EdgeHTML Platform Status

"display: contents" allows you to control the box generation of an element. The element with "display: contents" won't generate any box, but its children and pseudo-elements will still do it as normal. It's like the element has been replaced by its children and pseudo-elements.

Provides a way to blend an HTML or SVG element with its backdrop

Roadmap Priority: Low — We are still evaluating this technology. There may be significant spec stabilization, foundational work, or additional community input required before we can begin development.

The :focus-within pseudo-class applies to elements for which the :focus pseudo class applies. An element also matches :focus-within if one of its descendants in the flat tree (including non-element nodes, such as text nodes) matches the conditions for matching :focus.

Roadmap Priority: High — We intend to begin development soon.

Support the attr() function as a component value in properties applied to an element. Currently, attr() is only supported in the content property applied to pseudo-elements.

Roadmap Priority: Low — We are still evaluating this technology. There may be significant spec stabilization, foundational work, or additional community input required before we can begin development.

The ::-webkit-scrollbar CSS pseudo-element affects the style of the scrollbar of an element.

Roadmap Priority: Medium — Development is likely for a future release.

Define arbitrary shapes inside and around which inline content can flow.

Roadmap Priority: Medium — Development is likely for a future release.

The relational pseudo-class, :has(), is a functional pseudo-class taking a relative selector list as an argument. Similar to jQuery’s :has() selector.

Roadmap Priority: Low — We are still evaluating this technology. There may be significant spec stabilization, foundational work, or additional community input required before we can begin development.

CSS properties for aligning boxes within their container. Allows for true vertical centering among other features.

Roadmap Priority: Low — We are still evaluating this technology. There may be significant spec stabilization, foundational work, or additional community input required before we can begin development.

CSS properties that control the position and size of replaced content within the content box

Roadmap Priority: Medium — Development is likely for a future release.

Adds a will-change CSS property, that can be used to signal that a particular property is likely to be changed in the future, or that an element's content is likely to change.

Roadmap Priority: Low — We are still evaluating this technology. There may be significant spec stabilization, foundational work, or additional community input required before we can begin development.

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.

Roadmap Priority: Low — We are still evaluating this technology. There may be significant spec stabilization, foundational work, or additional community input required before we can begin development.

Specifies a gradient where the color stops are placed around the circumference of a circle.

Roadmap Priority: Low — We are still evaluating this technology. There may be significant spec stabilization, foundational work, or additional community input required before we can begin development.

Provides a hint to the browser on which scaling algorithm should be used.

Roadmap Priority: Low — We are still evaluating this technology. There may be significant spec stabilization, foundational work, or additional community input required before we can begin development.

Motion paths allow authors to animate any graphical object along an author specified path.

Roadmap Priority: Medium — Development is likely for a future release.

The all property is a shorthand that resets all CSS properties except direction and unicode-bidi

Roadmap Priority: Medium — Development is likely for a future release.

Enables responsive images in CSS by specifiying multiple resolutions of an image that the browser can select from for the given situation.

Roadmap Priority: Medium — Development is likely for a future release.

Adds an optional argument to existing scroll APIs that specifies whether scrolling should be smooth. Also adds a CSS property for this.

Boolean attribute for the <style> element (<style scoped>). When present, its styles only apply to the parent element.

The tab-size property sets the size used to render tab characters in situations where white space is preserved

Roadmap Priority: Medium — Development is likely for a future release.

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

Roadmap Priority: High — We intend to begin development soon.

Applies while an element matches the :focus pseudo-class and the user agent (browser, etc) determines via heuristics that the focus should be made evident on the element.

Roadmap Priority: Low — We are still evaluating this technology. There may be significant spec stabilization, foundational work, or additional community input required before we can begin development.

The :scope pseudo-class represents any element that is in the contextual reference element set.

Roadmap Priority: Medium — Development is likely for a future release.

Filter effects are a way of processing an element’s rendering before it is displayed in the document.

CSS properties helpful for printed publication.

Add support for the CSS font-stretch property.

Unprefixed version: IE 9+, Microsoft Edge build 10240+

View Changelog: Build Number 10240+

A CSS box model optimized for user interface design. The children of a flex container can be laid out in any direction and can "flex" their sizes to fill unused space and avoid overflowing the parent.

Prefixed version: IE 10+, Microsoft Edge build 10240+

Unprefixed version: IE 11, Microsoft Edge build 10240+

View Changelog: Build Number 10240+

A two-dimensional grid-based layout system, optimized for user interface design.

Prefixed version: IE 10+, Microsoft Edge build 10240+

Unprefixed version: Microsoft Edge build 16299+

View Changelog: Build Number 10240+

Define areas inline content should avoid, and how inline content should wrap around them.

Prefixed version: IE 10+, Microsoft Edge build 10240+

View Changelog: Build Number 10240+

One dppx unit represents the number of 'dots' in a CSS px.

Unprefixed version: Microsoft Edge build 10240+

View Changelog: Build Number 10240+

Allows to query the device pixel count per CSS unit

Unprefixed version: IE 9+, Microsoft Edge build 10240+

View Changelog: Build Number 10240+

Augments existing CSS 3d transforms by facilitating the construction of complex 3d scenes.

Unprefixed version: Microsoft Edge build 10240+

View Changelog: Build Number 10240+

Specifies the blending mode used for each background layer

Preview in: Windows Insider Preview Build 17763+ by enabling in about:flags

View Changelog: Build Number 17763+

Allows content to be flowed into multiple columns with a gap and a rule between them using CSS.

Unprefixed version: IE 10+, Microsoft Edge build 10240+

View Changelog: Build Number 10240+

position: sticky is a new way to position elements and is conceptually similar to position: fixed. The difference is that a stickily positioned element behaves like position: relative within its parent, until a given offset threshold is met.

Unprefixed version: Microsoft Edge build 16299+

View Changelog: Build Number 16299+

Method of allowing calculated values for length units, i.e. width: calc(100% - 3em)

Unprefixed version: IE 9+, Microsoft Edge build 10240+

View Changelog: Build Number 10240+

Enables changing the position of content in 3D space without disrupting the normal flow. See also preserve-3d.

Prefixed version: IE 9+, Microsoft Edge build 10240+

Unprefixed version: IE 10+, Microsoft Edge build 10240+

View Changelog: Build Number 10240+

The function allows filtering using SVG Filter elements as the filter function.

Based on experience with WOFF 1.0, which is widely deployed, this specification was developed to provide improved compression and thus lower use of network bandwidth, while still allowing fast decompression even on mobile devices. This is achieved by combining a content-aware preprocessing step and improved entropy coding, compared to the Flate compression used in WOFF 1.0.

Unprefixed version: Microsoft Edge build 14316+

View Changelog: Build Number 14316+

CSS properties that control the position and size of replaced content within the content box

Unprefixed version: Microsoft Edge build 16299+

View Changelog: Build Number 16299+

Support for the @supports at-rule and the "window.CSS.supports()" API

Unprefixed version: Microsoft Edge build 10240+

View Changelog: Build Number 10240+