corner-start-start-shape | CSS CSS Properties

An experimental property to set the shape of the corner at the start of both the block and inline axes (usually the top-left corner).

Quick example

.modern-button {
  /* Experimental: sets specific shape for top-left corner */
  corner-start-start-shape: angle;
}

Initial value

round

Inherited

Applies to

all elements

Animation type

superellipseInterpolation

Limited availability 67% global usage

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Not ready for production without a fallback.

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