-moz-outline-radius-topleft

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

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

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`-moz-outline-radius-topleft`	No	No	1-88 From Firefox 88, outline now follows the shape created by border-radius automatically, so this property is no longer needed (see bug 1694146).	No	No	No	No	No	4-88 From Firefox 88, outline now follows the shape created by border-radius automatically, so this property is no longer needed (see bug 1694146).	No	No	No