Contact emails
[email protected]

Specification
https://drafts.csswg.org/css-shapes-1/#funcdef-basic-shape-polygon


Summary
Allows an optional corner-rounding parameter in the polygon() CSS shape 
function. Developers can specify a length value to round polygon corners 
without manually computing bezier curves. Interactive demo: 
https://codepen.io/yisi/pen/NPRLEQN CSSWG issue: 
https://github.com/w3c/csswg-drafts/issues/9843


Blink component
Blink>CSS


Web Feature ID
shape-function


Motivation
Rounded polygons are a common design pattern on the web. Without this feature, 
developers who want rounded corners on a polygon shape must manually compute 
bezier control points or use workarounds such as SVG clip paths. The polygon() 
round parameter makes this directly expressible in CSS, reducing complexity and 
improving maintainability.


Initial public proposal
No information provided


TAG review
No information provided


TAG review status
Not applicable


Goals for experimentation
None


Risks




Interoperability and Compatibility
No information provided

Gecko: No signal (https://github.com/mozilla/standards-positions/issues/1197)

WebKit: No signal (https://github.com/WebKit/standards-positions/issues/474)

Web developers: No signals

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 information provided



Debuggability
No information provided


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



Flag name on about://flags
No information provided


Finch feature name
CSSPolygonRounding


Rollout plan
Will ship enabled for all users


Requires code in //chrome?
False


Tracking bug
https://issues.chromium.org/issues/329302249


Estimated milestones


Shipping on desktop 150

Shipping on Android 150

Shipping on WebView 150




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).
No information provided


Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/6636392944893952?gate=6487513336250368


This intent message was generated by Chrome Platform Status.

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