The border-top-right-radius
CSS property rounds the top-right corner of an element by specifying the radius (or the radius of the semi-major and semi-minor axes) of the ellipse defining the curvature of the corner.
The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
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.
[[File:../../../../../media.prod.mdn.mozit.cloud/attachments/2012/07/09/3635/ea5a3bdde54bd7cd5a4902ddae01b073/border-top-right-radius.png|class=default internal|border-top-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.
Note: If the value of this property is not set in a border-radius
shorthand property that is applied to the element after the border-top-right-radius
CSS property, the value of this property is then reset to its initial value by the shorthand property.
Syntax
/* the corner is a circle */ /* border-top-right-radius: radius */ border-top-right-radius: 3px; /* the corner is an ellipse */ /* border-top-right-radius: horizontal vertical */ border-top-right-radius: 0.5em 1em; border-top-right-radius: inherit;
With one value:
- the value is a
<length>
or a<percentage>
denoting the radius of the circle to use for the border in that corner.
With two values:
- the first value is a
<length>
or a<percentage>
denoting the horizontal semi-major axis of the ellipse to use for the border in that corner. - the second value is a
<length>
or a<percentage>
denoting the vertical semi-major axis of the ellipse to use for the border in that corner.
Values
<length-percentage>
- Denotes the size of the circle radius or the semi-major and semi-minor axes of the ellipse. As absolute length it can be expressed in any unit allowed by the CSS
<length>
data type. Percentages for the horizontal axis refer to the width of the box, percentages for the vertical axis refer to the height of the box. Negative values are invalid.
Formal definition
Initial value | 0
|
Applies to | all elements; but User Agents are not required to apply to table and inline-table elements when border-collapse is collapse . The behavior on internal table elements is undefined for the moment.. It also applies to ::first-letter .
|
Inherited | no |
Percentages | refer to the corresponding dimension of the border box |
Computed value | two absolute <length> s or <percentage> s
|
Animation type | a length, percentage or calc(); |
Formal syntax
<length-percentage>{1,2}where <length-percentage> = <length> | <percentage>
Examples
Examples of different border-top-right-radius values
Live example | Code |
---|---|
|
An arc of circle is used as the border
|
|
An arc of ellipse is used as the border
|
|
The box is a square: an arc of circle is used as the border
|
|
The box is not a square: an arc of ellipse is used as the border
|
|
The background color is clipped at the border
|
Specifications
Specification | Status | Comment |
---|---|---|
CSS Backgrounds and Borders Module Level 3The definition of 'border-top-right-radius' in that specification. | Candidate Recommendation | Initial definition |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
border-top-right-radius
|
Chrome Full support 4 Full support 4 Full support 1 Prefixed' Implemented with the vendor prefix: -webkit- |
Edge Full support 12 Full support 12 Full support 12 Prefixed' Implemented with the vendor prefix: -webkit- |
Firefox Full support 4 Full support 4 Notes' Prior to Firefox 50, border styles of rounded corners were always rendered as if Prefixed' Implemented with the vendor prefix: -webkit- Full support 44 Prefixed' Implemented with the vendor prefix: -webkit-
Disabled' From version 44: this feature is behind the Alternate Name' Uses the non-standard name: |
IE
Full support 9 |
Opera Full support 10.5 Full support 10.5 Full support 15 Prefixed' Implemented with the vendor prefix: -webkit- |
Safari Full support 5 Full support 5 Full support 3 Prefixed' Implemented with the vendor prefix: -webkit- |
WebView Android Full support ≤37 Full support ≤37 Full support ≤37 Prefixed' Implemented with the vendor prefix: -webkit- |
Chrome Android Full support 18 Full support 18 Full support 18 Prefixed' Implemented with the vendor prefix: -webkit- |
Firefox Android Full support 4 Full support 4 Notes' Prior to Firefox 50, border styles of rounded corners were always rendered as if Prefixed' Implemented with the vendor prefix: -webkit- Full support 44 Prefixed' Implemented with the vendor prefix: -webkit-
Disabled' From version 44: this feature is behind the Alternate Name' Uses the non-standard name: |
Opera Android Full support 11 Full support 11 Full support 14 Prefixed' Implemented with the vendor prefix: -webkit- |
Safari iOS Full support 4.2 Full support 4.2 Full support 1 Prefixed' Implemented with the vendor prefix: -webkit- |
Samsung Internet Android Full support 1.0 Full support 1.0 Full support 1.0 Prefixed' Implemented with the vendor prefix: -webkit- |
Elliptical corners | Chrome
Full support 1 |
Edge
Full support 12 |
Firefox
Full support 3.5 |
IE
Full support 9 |
Opera
Full support 10.5 |
Safari
Full support 3 |
WebView Android
Full support ≤37 |
Chrome Android
Full support 18 |
Firefox Android
Full support 4 |
Opera Android
Full support 14 |
Safari iOS
Full support 1 |
Samsung Internet Android
Full support 1.0 |
Percentages | Chrome
Full support 4 |
Edge
Full support 12 |
Firefox Full support 4 Full support 4 Full support 1 Notes' Before Firefox 4, the |
IE
Full support 9 |
Opera
Full support 10.5 |
Safari
Full support 5 |
WebView Android
Full support ≤37 |
Chrome Android
Full support 18 |
Firefox Android
Full support 4 |
Opera Android
Full support 14 |
Safari iOS
Full support 4.2 |
Samsung Internet Android
Full support 1.0 |
Legend
- Full support
- Full support
- See implementation notes.'
- See implementation notes.
- User must explicitly enable this feature.'
- User must explicitly enable this feature.
- Uses a non-standard name.'
- Uses a non-standard name.
- Requires a vendor prefix or different name for use.'
- Requires a vendor prefix or different name for use.
See also
border-radius
shorthand propertyborder-bottom-right-radius
,border-bottom-left-radius
, andborder-top-left-radius
border-top-right-radius by Mozilla Contributors is licensed under CC-BY-SA 2.5.