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[css-borders-4] Improve definition of superellipse() #12263

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[css-borders-4] Improve definition of superellipse() #12263

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10 changes: 7 additions & 3 deletions css-borders-4/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -367,8 +367,7 @@ Issue <a href="https://github.com/w3c/csswg-drafts/issues/11610">#11610</a>: che
'corner-shape' values</h4>

<pre class=prod>
<dfn><<corner-shape-value>></dfn> = <l>''round''</l> | <l>''scoop''</l> | <l>''bevel''</l> | <l>''notch''</l> | <l>''<corner-shape-value>/square''</l> | <l>''squircle''</l> |
superellipse(<<number [-&infin;,&infin;]>> | infinity | -infinity)
<dfn><<corner-shape-value>></dfn> = <l>''round''</l> | <l>''scoop''</l> | <l>''bevel''</l> | <l>''notch''</l> | <l>''<corner-shape-value>/square''</l> | <l>''squircle''</l> | <<superellipse()>>
</pre>

<dl dfn-type="value" dfn-for="<corner-shape-value>">
Expand All @@ -392,7 +391,12 @@ Issue <a href="https://github.com/w3c/csswg-drafts/issues/11610">#11610</a>: che
<dd>Border radii define a convex curve between an ellipse and an convex angle, equivalent to <css>superellipse(2)</css>.
</dl>

The <dfn>superellipse( <<number>> | infinity | -infinity )</dfn> function describes the <dfn>superellipse parameter</dfn> of the corner.
The <dfn>superellipse()</dfn> function describes the <dfn>superellipse parameter</dfn> of the corner. Its syntax is as follows:

<pre class=prod>
<<superellipse()>> = superellipse( <<number>> | infinity | -infinity )
</pre>

It is a number between <css>-infinity</css> and <css>infinity</css>, with <css>-infinity</css> corresponding to a straight concave corner,
<css>infinity</css> corresponding to a square convex corner.

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