CSS border-radius Property
Demo
CSS border-radius Property
CSS border-radius property rounds the corners of an element's outer border edge.
Example
<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
div{
border: 1px solid black;
width: 150px;
height: 150px;
line-height: 150px;
text-align: center;
border-radius: 25px;
}
</style>
</head>
<body>
<h1>CSS border-radius Property</h1>
<div>
border-radius: 25px;
</div>
</body>
</html>
Syntax
Using CSS
element{
border-radius: 25px;
}
Using Javascript
object.style.borderRadius="25px";
Animatable
Yes, border-radius property is animatable. CSS Animatable Properties Reference.
Default Value
Default value for CSS border-radius property is 0.
Property Value
The following table provides a list of all values for CSS border-radius property.
| Value | Explanation |
|---|
| length | Allows you to define the shape the shape of the corners in any CSS length unit. |
| % | Allows you to define the shape of the corners in %. |
Using Percentage Value
Set border-radius to 50% to change a square border to a circle.
Example
<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
div{
border: 1px solid black;
width: 150px;
height: 150px;
line-height: 150px;
text-align: center;
border-radius: 50%;
}
</style>
</head>
<body>
<h1>CSS border-radius Property</h1>
<div>
border-radius: 50%;
</div>
</body>
</html>
Using JavaScript
In the following example, we will demonstrate how to change the CSS border-radius property of an element using JavaScript.
Example
<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
div{
padding: 10px;
margin-bottom: 10px;
border: 1px solid black;
width: 150px;
height: 150px;
line-height: 150px;
}
</style>
</head>
<body>
<h1>CSS border-radius Property</h1>
<div>
This is div container.
</div>
<button onclick="myFunction()">Click Me</button>
<script>
var x = document.getElementsByTagName("div")[0];
function myFunction(){
x.style.borderRadius = "50%";
}
</script>
</body>
</html>
CSS border-radius is a shorthand CSS Property
The border-radius is a shorthand CSS Property of the following CSS properties.
The border-radius CSS property can have one, two, three, or four values.
- border-radius: 50px
- all four borders are rounded to 50px.
- border-radius: 50px 10px
- top-left and bottom-right corners are 50px
- top-right and bottom-left corners are 10px
- border-radius: 100px 50px 10px
- top-left corner is 100px
- top-right and bottom-left corners are 50px
- bottom-right corner is 10px
- border-radius: 150px 100px 50px 10px
- top-left corner is 150px
- top-right corner is 100px
- bottom-right corner is 50px
- bottom-left corner is 10px
Example
<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
div{
border: 1px solid black;
width: 280px;
height: 280px;
line-height: 280px;
text-align: center;
}
#point{
border-radius: 50px;
}
#point1{
border-radius: 50%;
}
#point2{
border-radius: 50px 10px;
}
#point3{
border-radius: 100px 50px 10px;
}
#point4{
border-radius: 150px 100px 50px 10px;
}
</style>
</head>
<body>
<h1>CSS border-radius Property</h1>
<h2>border-radius: 50px;</h2>
<div id="point">
border-radius: 50px;
</div>
<h2>border-radius: 50%;</h2>
<div id="point1">
border-radius: 50%;
</div>
<h2>border-radius: 50px 10px;</h2>
<div id="point2">
border-radius: 50px 10px;
</div>
<h2>border-radius: 100px 50px 10px;</h2>
<div id="point3">
border-radius: 100px 50px 10px;
</div>
<h2>border-radius: 150px 100px 50px 10px;</h2>
<div id="point4">
border-radius: 150px 100px 50px 10px;
</div>
</body>
</html>
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