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目录

CSS border-top-left-radius Property

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Example

Add rounded borders to the top-left corner of two <div> elements:

#example1 {
  border: 2px solid red;
  border-top-left-radius: 25px;
}

#example2 {
  border: 2px solid red;
  border-top-left-radius: 50px 20px;
}
Try it Yourself »

More "Try it Yourself" examples below.

Definition and Usage

The border-top-left-radius property defines the radius of the top-left corner.

Tip: This property allows you to add rounded borders to elements!

Show demo ❯

Default value: 0
Inherited: no
Animatable: yes. Read about animatable Try it
Version: CSS3
JavaScript syntax: object.style.borderTopLeftRadius="25px" Try it

Browser Support

The numbers in the table specify the first browser version that fully supports the property.

Numbers followed by -webkit- or -moz- specify the first version that worked with a prefix.

Property
border-top-left-radius 5.0
4.0 -webkit-		 9.0 4.0
3.0 -moz-		 5.0
3.1 -webkit-		 10.5

CSS Syntax

border-top-left-radius: length| % [ length| %]|initial|inherit;

Note: If you set two values, the first one is for the top border, and the second one for the left border. If the second value is omitted, it is copied from the first. If either length is zero, the corner is square, not rounded.

Property Values

Value Description Demo
length Defines the shape of the top-left corner. Read about length units Demo ❯
% Defines the shape of the top-left corner in % Demo ❯
initial Sets this property to its default value. Read about initial
inherit Inherits this property from its parent element. Read about inherit

More Examples

Example

Add rounded borders to the top-left corner in percent:

#example1 {
  border: 2px solid red;
  background: url(paper.gif);
  padding: 10px;
  border-top-left-radius: 40%;
}
Try it Yourself »

Related Pages

CSS tutorial: CSS Rounded Corners

HTML DOM reference: borderTopLeftRadius property


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