Example
Change the width of the four borders of a <div> element:
document.getElementById("myDiv").style.borderWidth = "thick";Try it Yourself »
Definition and Usage
The borderWidth property sets or returns the width of an element's border.
This property can take from one to four values:
- One value, like: p {border-width: thick} - all four borders will be thick
- Two values, like: p {border-width: thick thin} - the top and bottom border will be thick, left and right border will be thin
- Three values, like: p {border-width: thick thin medium}- the top border will be thick, left and right border will be thin, bottom border will be medium
- Four values, like: p {border-width: thick thin medium 10px} - the top border will be thick, right border will be thin, bottom border will be medium, left border will be 10px
Browser Support
The borderWidth property is supported in all major browsers.
Syntax
Return the borderWidth property:
object.style.borderWidth
Set the borderWidth property:
object.style.borderWidth="thin|medium|thick|length|initial|inherit"
Property Values
| Value | Description |
|---|---|
| thin | Defines a thin border |
| medium | Defines a medium border. This is default |
| thick | Defines a thick border |
| length | The width of the border in length units |
| initial | Sets this property to its default value. Read about initial |
| inherit | Inherits this property from its parent element. Read about inherit |
Technical Details
| Default Value: | medium |
|---|---|
| Return Value: | A String, representing the width of an element's border |
| CSS Version | CSS1 |
More Examples
Example
Change the width of the top and bottom border to thick, and the left and right border to thin of a <div> element:
document.getElementById("myDiv").style.borderWidth = "thick thin";
Try it Yourself »
Example
Change the width of the four borders of a <div> element, using the length value:
document.getElementById("myDiv").style.borderWidth = "1px 5px 10px
20px";
Try it Yourself »
Example
Return the width of the border of a <div> element:
alert(document.getElementById("myDiv").style.borderWidth);
Try it Yourself »
Related Pages
CSS tutorial: CSS Border
CSS reference: border-width property
HTML DOM reference: border property
< Style Object