Contact emailstcap...@chromium.org

ExplainerNone

Specification
https://w3c.github.io/csswg-drafts/css-images-4/#image-set-notation

Summary

Unprefix -webkit-image-set to expose the current image-set functionality
without needing the '-webkit-' prefix.


Blink componentBlink
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink>
Motivation

Currently Blink only supports '-webkit-' prefixed image-set, while Gecko
and WebKit support both prefixed and unprefixed versions. With this change
interop with Gecko and WebKit will be increased by allowing web developers
to use the current Blink image-set functionality both with and without the
'-webkit-' prefix.

Search tagsimage-set <https://chromestatus.com/features#tags:image-set>

TAG reviewSkipping because this is a straightforward interop fix.

TAG review statusNot applicable

Risks


Interoperability and Compatibility

The Interoperability Risk is Low. This change increases interop with Gecko
and WebKit which already support both '-webkit-' prefixed and unprefixed
image-set. The Compatibility Risk is Low. If both prefixed and standard
versions are defined in the right order, and the standard version fails
parsing, Blink will fallback to the prefixed version. The
'image-set-fallback' test has been added to verify this behavior.


*Gecko*: Shipped/Shipping (
https://hg.mozilla.org/integration/autoland/rev/5c09b1d070e2)

*WebKit*: Shipped/Shipping (https://trac.webkit.org/changeset/202765/webkit)

*Web developers*: Strongly positive - This issue has been Starred by 55
users.

*Other signals*:

WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that
it has potentially high risk for Android WebView-based applications?

No


Debuggability

N/A

Will this feature be supported on all six Blink platforms (Windows, Mac,
Linux, Chrome OS, Android, and Android WebView)?Yes

Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
?Yes
https://wpt.fyi/results/css/css-images/image-set

Flag nameCSSImageSet

Requires code in //chrome?False

Tracking bughttps://crbug.com/630597

Estimated milestones

110 Or 111


Anticipated spec changes

Open questions about a feature may be a source of future web compat or
interop issues. Please list open issues (e.g. links to known github issues
in the project for the feature specification) whose resolution may
introduce web compat/interop risk (e.g., changing to naming or structure of
the API in a non-backward-compatible way).
None

Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5109745420075008

This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.

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