Style borderWidth
Property
Definition and Usage
The borderWidth
property sets or returns the width of an element's border.
This property can use from 1 to 4 widths:
If one width is specified, e.g.,
p {border-width: thick}
- all four borders are thick.If two widths are specified, e.g.,
p {border-width: thick thin}
- the top and bottom borders are thick, while the left and right borders are thin.If three widths are specified, e.g.,
p {border-width: thick thin medium}
- the top border is thick, the left and right borders are thin, and the bottom border is medium.If four widths are specified, e.g.,
p {border-width: thick thin medium 10px}
- the top border is thick, the right border is thin, the bottom border is medium, and the left border is 10px wide.
Syntax
Set the borderWidth
property:
Return the borderWidth
property:
Value | Description |
---|---|
thin | Defines a thin border. |
medium | Default. Defines a medium border. |
thick | Defines a thick border. |
length | Allows you to define the width of the border. |
inherit | The border width is inherited from the parent element. |
Browser Support
All major browsers support the borderWidth
property.
Note: IE7 and earlier versions do not support the "inherit" value. IE8 only supports "inherit" if the !DOCTYPE is specified. IE9 supports "inherit".
Example
Change the width of all four borders:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>tutorialpro.org(tutorialpro.org)</title>
<style type="text/css">
#ex1{
border: 1px solid #FF0000;
}
</style>
<script>
function displayResult(){
document.getElementById("ex1").style.borderWidth="thick thin";
}
</script>
</head>
<body>
<div id="ex1">This is some text</div>
<br>
<button type="button" onclick="displayResult()">Modify the width of all four borders</button>
</body>
</html>