1702365 - Implement `dynamic-range` media query (Media Queries Level 5)

Status: NEW

(Core :: CSS Parsing and Computation, enhancement)

Description

[Kai [:schweinepriester]]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36

Steps to reproduce:

1. Try to use @media (dynamic-range: high), e.g. on this test page https://codepen.io/argyleink/pen/oNxeWbz by Adam "argyleink" Argyle¹
2. Test page is solid color

¹ https://github.com/Fyrd/caniuse/issues/5341#issuecomment-811432514

• Spec: https://drafts.csswg.org/mediaqueries-5/#dynamic-range
• Safari: Shipped with 13.1 https://webkit.org/blog/10247/new-webkit-features-in-safari-13-1/#post-10247:~:text=Finally%2C%20WebKit%20includes%20support%20for%20the,create%20styles%20specific%20to%20display%20capabilities.
• Caniuse: https://github.com/Fyrd/caniuse/issues/5341

Actual results:

dynamic-range not yet implemented 0:-)

Expected results:

dynamic-range recognised and test page shows icon (https://user-images.githubusercontent.com/2644614/113220649-d6f9d380-9283-11eb-91e0-0cad3904af70.png)

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: Playback' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[Andrei Purice]

Setting this enhancement to New to gain visibility.

Comment 3

[Daniel Holbert [:dholbert]]

Note, this feature is probably most-useful when combined with the CSS color() function (which lets you specify a particular color space), which is bug 1128204. --> Adding a "see-also" for that bug.

Comment 4

[Oliver Medhurst [:canadahonk]]

To note, we technically implement this media feature now (not sure since when?), see WPTs: https://wpt.fyi/results/css/mediaqueries/dynamic-range.html

But always give standard instead of actually what the system supports as per spec, and there are still some bugs/quirks in our implementation (see WPT failures).