| Inherited | Initial | Version |
|---|---|---|
| No | medium |
CSS2, 2.1 |
| IE8+ | FF1.5+ | SA1.3+ | OP9.2+ | CH2+ |
|---|---|---|---|---|
| Buggy | Buggy | Full | Full | Full |
Syntax
Description
The
outline-width property sets the width of the outline
that’s drawn around an element. See outline for more
information about outlines.
Note that even though an
outline-width has been set,
outline-style must have a value other than
none before the outline will
show.
Example
This style rule assigns an outline with
a 2px width on focus to anchor elements within the element with ID
"example":
#example a:focus {
outline-width: 2px;
outline-style: solid;
}Value
The property takes the same values
as border-width—for
example, a CSS length (px, pt, em, and so on) or one of the allowed
keywords—but percentage or negative values are not allowed.
The keyword width values of thin, medium, and thick aren’t explicitly defined—their display will depend on the user agent—but have the following meaning: thin <= medium <= thick.
Compatibility
| Internet Explorer | Firefox | Safari | Opera | Chrome | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5.5 | 6.0 | 7.0 | 8.0 | 1.0 | 1.5 | 2.0 | 3.0 | 3.5 | 1.3 | 2.0 | 3.1 | 4.0 | 9.2 | 9.5 | 10.0 | 2.0 |
| None | None | None | Buggy | None | Buggy | Buggy | Buggy | Buggy | Full | Full | Full | Full | Full | Full | Full | Full |
Internet Explorer for Windows (up to and including
version 7) and Firefox 1.0 provide no support for
outline.
Internet Explorer for
Windows version 8 mis-positions the outline on inline
elements when the parent element has the property/value
text-align justify. The
outline remains at the exact position had the value
justify not been used and will therefore be
misaligned with the element it refers to depending on how far the text has
been moved when justified.
Firefox up to and including version 3.5
will draw the outline outline around the content of an
element that has overflowed its boundaries rather than around the
element’s actual set dimensions.
