border-bottom-right-radius

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Summary

The border-bottom-right-radius CSS property sets the rounding of the bottom-right corner of the element. The rounding can be a circle or an ellipse, or if one of the value is 0 no rounding is done and the corner is square.

border-bottom-right-radius.png

A background, being an image or a color, is clipped at the border, even a rounded one; the exact location of the clipping is defined by the value of the background-clip property.

If the value of this property is not set in a border-radius shorthand property that is applied to the element after the border-bottom-right-radius CSS property, the value of this property is then reset to its initial value by the shorthand property.

Syntax

Formal grammar: [ <length> | <percentage> ] [ <length> | <percentage> ]? 
border-bottom-right-radius: radius               /* the corner is a circle    */  E.g. border-bottom-right-radius: 3px
border-bottom-right-radius: horizontal vertical  /* the corner is an ellipsis */  E.g. border-bottom-right-radius: 0.5em 1em

border-bottom-right-radius: inherit

where:

radius
Is a <length> or a <percentage> denoting the radius of the circle to use for the border in that corner.
horizontal
Is a <length> or a <percentage> denoting the horizontal semi-major axis of the ellipsis to use for the border in that corner.
vertical
Is a <length> or a <percentage> denoting the vertical semi-major axis of the ellipsis to use for the border in that corner.

Values

<length>
Denotes the size of the circle radius or the semi-major and semi-minor axes of the ellipsis. It can be expressed in any unit allowed by the CSS <length> data types. Negative values are invalid.
<percentage>
Denotes the size of the circle radius, or the semi-major and semi-minor axes of the ellipsis, using percentage values. Percentages for the horizontal axe refer to the width of the box, percentages for the vertical axe refer to the height of the box. Negative values are invalid.

Examples

Live example Code
.
An arc of circle is used as the border
div {
  border-bottom-right-radius: 40px 40px;
}
.
An arc of ellipse is used as the border
div {   
  border-bottom-right-radius: 40px 20px;
}
.
The box is a square: an arc of circle is used as the border
div {   
  border-bottom-right-radius: 40%;
}
.
The box is not a square: an arc of ellipse is used as the border
div {   
  border-bottom-right-radius: 40%;
}
.
The background color is clipped at the border
div {
  border-bottom-right-radius:40%;
  border-style: black 3px double;
  background-color: rgb(250,20,70);
  background-clip: content-box;
}

Specifications

Specification Status Comment
CSS Backgrounds and Borders Module Level 3 Candidate Recommendation Initial specification

Browser compatibility

  • Desktop
  • Mobile

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 0.2 -webkit

1.0 (1.0) - 12.0 (12.0) -moz
but with a non-standard name :
-moz-border-radius-bottomright

9.0 10.5 3.0 (522) -webkit
4.0 4.0 (2.0) 5.0 (532.5)
Percentages 4.0 1.0 (1.0) with a bug (see note) 9.0 10.5 5.0 (532.5)
4.0 (2.0)
Elliptical corners 0.2 3.5 (1.9.1) 9.0 10.5 3.0 (522 )
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ? ? ? ? ?

Browser notes

Gecko

  • The prefixed version (allowed from Firefox 1 to Firefox 12) of this property uses a different name, -moz-border-radius-bottomright, than the final property as Mozilla implemented it before the final name was coined.
  • Before Firefox 4, the <percentage> was relative to the width of the box even when specifying the radius for a height). This implied that -moz-border-radius-bottomright was always drawing an arc of circle, and never an ellipse, when followed by a single value.
  • Gecko is not able to display dotted and dashed rounded corners correctly: it displays them as solid ( bug 382721 ).

See also

The border-radius-related CSS properties: the CSS shorthand border-radius , the properties for the other corners: border-top-right-radius , border-top-left-radius , and border-bottom-left-radius .

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The three types of border corners
20.54 kB13:13, 28 Feb 2012TeoliActions

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