Example
Change the width of the bottom border of a <div> element to 10px:
document.getElementById("myDiv").style.borderBottomWidth = "10px";Try it Yourself »
More "Try it Yourself" examples below.
Definition and Usage
The borderBottomWidth property sets or returns the width of the bottom border of an element.
Browser Support
The numbers in the table specify the first browser version that fully supports the property.
| Property | |||||
|---|---|---|---|---|---|
| borderBottomWidth | 1.0 | 4.0 | 1.0 | 1.0 | 3.5 |
Syntax
Return the borderBottomWidth property:
object.style.borderBottomWidth
Set the borderBottomWidth property:
object.style.borderBottomWidth="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 bottom border |
| CSS Version | CSS1 |
More Examples
Example
Change the width of the bottom border of a <div> element to thin:
document.getElementById("myDiv").style.borderBottomWidth = "thin";
Try it Yourself »
Example
Return the width of the bottom border of a <div> element:
alert(document.getElementById("myDiv").style.borderBottomWidth);
Try it Yourself »
Related Pages
CSS tutorial: CSS Border
CSS reference: border-bottom-width property
HTML DOM reference: border property
< Style Object