Lea Verou 10/30/2010

The curious case of border-radius:50%

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This article delves into the CSS border-radius property when used with percentage values. It explains the W3C specification, discusses historical browser bugs and inconsistencies (particularly in Firefox), and highlights why percentages are uniquely useful for creating perfect circles and ellipses without knowing an element's dimensions in advance.

The curious case of border-radius:50%

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