Web/CSS/-moz-outline-radius-topleft

Non-standard This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

In Mozilla applications, the -moz-outline-radius-topleft CSS property can be used to round the top-left corner of an element's outline.

Syntax

The value of -moz-outline-radius-topleft is either a CSS <length> or a percentage of the corresponding dimensions of the border box. The calc() function may be used as well.

Values

<length>: The radius of the circle defining the curvature of the top and left edges of the element, specified as a CSS <length>.
<percentage>: The radius of the circle defining the rounding of the top-left corner of the element, specified as the percentages of the top and left sides of the border box.

Formal definition

Initial value	`0`
Applies to	all elements
Inherited	no
Percentages	refer to the corresponding dimension of the border box
Computed value	as specified
Animation type	a length, percentage or calc();

Formal syntax

<outline-radius>where <outline-radius> = <length> | <percentage>

Examples

The example below will not display the desired effect if you are viewing this in a browser other than Firefox.

HTML

<p>Look at this paragraph's top-left corner.</p>

CSS

p {
  margin: 5px;
  border: solid cyan;
  outline: dotted red;
  -moz-outline-radius-topleft: 2em;
}

Result

Specifications

Not part of any standard.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`-moz-outline-radius-topleft` Deprecated'Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 1	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 4	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
Non-standard. Expect poor cross-browser support.': Non-standard. Expect poor cross-browser support.
Deprecated. Not for use in new websites.': Deprecated. Not for use in new websites.