Definition and Usage
The border-bottom-width CSS property sets the width of the bottom border of a box.
- Initial medium
- Applies to all elements
- Inherited no
- Media visual
-
Computed Value the absolute length or 0 if border-bottom-style is none or hidden
-
Animatable yes, as a length
- Canonical order the unique non-ambiguous order defined by the formal grammar
Syntax
Formal syntax: <br-width>
border-bottom-width: 10em /* Any <length> value */
border-bottom-width: 3vmax
border-bottom-width: 6px
border-bottom-width: thin /* A keyword */
border-bottom-width: medium
border-bottom-width: thick
border-right-width: inherit
Values
- <br-width>
-
Is either a non-negative explicit <length> value or a keyword denoting the thickness of the bottom border. The keyword must be one of the following values:
thin |
|
A thin border |
medium |
|
A medium border |
thick |
|
A thick border |
The specification doesn't precisely define the thickness of each of the keywords, which is therefore implementation specific. Nevertheless, it requests that the thickness does follow the thin ≤ medium ≤ thick inequality and that the values are constant on a single document.
- inherit
- Represents the calculated value of the border-bottom-width of the parent's element.
Examples
element {
border-bottom-width: thin;
border-bottom-style: solid;
border-bottom-color: #000;
}
Compatibility
Desktop browsers
Feature |
Chrome |
Firefox (Gecko) |
Internet Explorer |
Opera |
Safari (WebKit) |
Basic support |
1.0 |
1.0 (1.0) |
4.0 |
3.5 |
1.0 (85) |
Mobile browsers
Feature |
Android |
Firefox Mobile (Gecko) |
IE Phone |
Opera Mobile |
Safari Mobile |
Basic support |
NA |
NA |
NA |
NA |
NA |