`corner-start-end-shape` CSS property

Baseline Limited availability

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

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The corner-start-end-shape CSS property specifies the shape of a box's block-start and inline-end corner, within its border-radius area.

For a full description of corner shape behavior and multiple examples, see the corner-shape shorthand property page.

Syntax

/* Keyword values */
corner-start-end-shape: square;
corner-start-end-shape: bevel;

/* superellipse() function values */
corner-start-end-shape: superellipse(1.5);
corner-start-end-shape: superellipse(-2.2);

/* Global values */
corner-start-end-shape: inherit;
corner-start-end-shape: initial;
corner-start-end-shape: revert;
corner-start-end-shape: revert-layer;
corner-start-end-shape: unset;

Values

The corner-start-end-shape property is specified using a <corner-shape-value> value.

Formal definition

Initial value	round
Applies to	all elements
Inherited	no
Computed value	The corresponding <a href="/en-US/docs/Web/CSS/Reference/Values/superellipse">superellipse()</a> value.
Animation type	Animates as per <a href="https://drafts.csswg.org/css-borders/#superellipse-interpolation">superellipse interpolation</a>.

Formal syntax

corner-start-end-shape = 
  <corner-shape-value>

<corner-shape-value> = 
  round |
  scoop |
  bevel |
  notch |
  square |
  squircle |
  <superellipse()>

<superellipse()> = 
  superellipse( [ <number> | infinity | -infinity ] )

Examples

You can find other related examples on the corner-shape reference page.

Basic `corner-start-end-shape` usage

HTML

The markup for this example contains a single <div> element.

<div></div>

CSS

We give the box some basic styles, which we've hidden for brevity. We also apply a box-shadow, a border-radius of 20px 40px 60px 80px, and a corner-start-end-shape of notch.

body {
  font-family: "Helvetica", "Arial", sans-serif;
  width: 240px;
  margin: 20px auto;
}

div {
  width: 100%;
  height: 180px;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: cyan;
  background-image: linear-gradient(
    to bottom,
    rgb(255 255 255 / 0),
    rgb(255 255 255 / 0.5)
  );
}

div {
  box-shadow: 1px 1px 3px gray;
  border-radius: 20px 40px 60px 80px;
  corner-start-end-shape: notch;
}

Result

The rendered result looks like this:

Specifications

Specification
CSS Borders and Box Decorations Module Level 4 # propdef-corner-start-end-shape

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`corner-start-end-shape`	139	139	No	123	preview	139	No	91	No	30.0	139	No
`bevel`	139	139	No	123	preview	139	No	91	No	30.0	139	No
`notch`	139	139	No	123	preview	139	No	91	No	30.0	139	No
`round`	139	139	No	123	preview	139	No	91	No	30.0	139	No
`scoop`	139	139	No	123	preview	139	No	91	No	30.0	139	No
`square`	139	139	No	123	preview	139	No	91	No	30.0	139	No
`squircle`	139	139	No	123	preview	139	No	91	No	30.0	139	No