Javascript DOM CSS Style borderRadius Property

Introduction

Add rounded borders to a div element: 

document.getElementById("myDIV").style.borderRadius = "25px";

Click the button to set the borderRadius property of the DIV element:

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<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {//  w ww.j av a 2  s.c  o m
  border: 1px solid black;
  width: 300px;
  height: 300px;
}
</style>
</head>
<body>
<button onclick="myFunction()">Test</button>

<div id="myDIV">
  <h1>Hello</h1>
</div>

<script>
function myFunction() {
  document.getElementById("myDIV").style.borderRadius = "25px";
}
</script>

</body>
</html>

The borderRadius property is a shorthand property for setting, or getting, the four borderRadius properties.

The four border radius properties are (in this order):

  • borderTopLeftRadius
  • borderTopRightRadius
  • borderBottomRightRadius
  • borderBottomLeftRadius

The four values for each radii are given in the order top-left, top-right, bottom-right, bottom-left.

If bottom-left is omitted it is the same as top-right.

If bottom-right is omitted it is the same as top-left.

If top-right is omitted it is the same as top-left.

Property Values

Value Description
length Defines the shape of the corners. Default value is 0
% Defines the shape of the corners in %
initial Sets this property to its default value.
inherit Inherits this property from its parent element.

The borderRadius property returns a String, representing the border-radius property of an element.




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