Contact emails
nrosent...@chromium.org

Explainer
None


Specification
https://drafts.csswg.org/css-shapes-2/#shape-function


Summary

shape() allows responsive custom shapes in CSS properties that accept a shape, 
currently limited to clip-path. It lets the author define a series of commands, 
equivalent to the commands in path(), but where the commands accept responsive 
units (eg % or vw), as well as any CSS values such as custom properties or 
rather than pixel-values. See 
https://drafts.csswg.org/css-shapes-2/#shape-function



Blink component
Blink>CSS


TAG review
None


TAG review status
Pending


Risks




Interoperability and Compatibility

None


Gecko: No signal (https://github.com/mozilla/standards-positions/issues/1153)

WebKit: Positive (https://bugs.webkit.org/show_bug.cgi?id=238371) Safari has 
already implemented this, available in STP.

Web developers: Positive See citations: 
https://jamesmcgrath.net/scaling-svg-clippath/ 
https://css-tricks.com/unfortunately-clip-path-path-is-still-a-no-go/ 
https://stackoverflow.com/questions/29495919/how-to-apply-clippath-to-a-div-with-the-clippath-position-being-relative-to-the
 
https://stackoverflow.com/questions/31210466/convert-svg-path-data-to-0-1-range-to-use-as-clippath-with-objectboundingbox
 
https://stackoverflow.com/questions/53618192/create-responsive-svg-clip-path-making-svg-path-responsive

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?

None




Debuggability

None



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


Is this feature fully tested by web-platform-tests?
Yes
https://wpt.fyi/results/css/css-shapes/shape-functions?label=master&label=experimental&aligned&q=shape
 (anything beginning with shape-) 
https://wpt.fyi/results/css/css-masking/clip-path?label=master&label=experimental&aligned&q=shape
 and 
https://wpt.fyi/results/css/css-masking/clip-path/animations?label=master&label=experimental&aligned&q=shape
 (clip-path-shape-*)



Flag name on about://flags
CSSShapeFunction


Finch feature name
CSSShapeFunction


Requires code in //chrome?
False


Tracking bug
https://issues.chromium.org/issues/40829059


Estimated milestones


Shipping on desktop 135

DevTrial on desktop 134

Shipping on Android 135

DevTrial on Android 134

Shipping on WebView 135




Anticipated spec changes

Open questions about a feature may be a source of future web compat or interop 
issues. Please list open issues (eg links to known github issues in the project 
for the feature specification) whose resolution may introduce web 
compat/interop risk (eg, 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/5172258539307008?gate=5143998661132288


Links to previous Intent discussions
Intent to Prototype: 
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/6759c7eb.2b0a0220.2dfede.0004.GAE%40google.com



This intent message was generated by Chrome Platform Status.

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