CSS border-top-width Property
More "Try it Yourself" examples below.
Definition and Usage
The border-top-width property sets the width of an element's top border.
Note: Always declare the border-style or the
border-top-style property before the border-top-width
property. An element must have borders before you can change the width.
| Default value: | medium |
|---|---|
| Inherited: | no |
| Animatable: | yes. Read about animatable Try it |
| Version: | CSS1 |
| JavaScript syntax: | object.style.borderTopWidth="5px" Try it |
Browser Support
The numbers in the table specify the first browser version that fully supports the property.
| Property | |||||
|---|---|---|---|---|---|
| border-top-width | 1.0 | 4.0 | 1.0 | 1.0 | 3.5 |
CSS Syntax
border-top-width: medium|thin|thick|length|initial|inherit;
Property Values
| Value | Description | Demo |
|---|---|---|
| medium | Specifies a medium top border. This is default | Demo ❯ |
| thin | Specifies a thin top border | Demo ❯ |
| thick | Specifies a thick top border | Demo ❯ |
| length | Allows you to define the thickness of the top border. Read about length units | Demo ❯ |
| initial | Sets this property to its default value. Read about initial | |
| inherit | Inherits this property from its parent element. Read about inherit |
More Examples
Example
Set the width of the top border to medium:
div {border-top-width: medium;}
Try it Yourself »
Related Pages
CSS tutorial: CSS Border
CSS reference: border-top property
HTML DOM reference: borderTopWidth property
