Set the width of an outline:
An outline is a line that is drawn around elements (outside the borders) to make the element "stand out".
The outline-width specifies the width of an outline.
Note: Always declare the outline-style property before the outline-width property. An element must have an outline before you change the width of it.
| Default value: | medium |
|---|---|
| Inherited: | no |
| Animatable: | yes, see individual properties. Read about animatable Try it |
| Version: | CSS2 |
| JavaScript syntax: | object.style.outlineWidth="2px" Try it |
An outline is a line around an element. It is displayed around the margin of the element. However, it is different from the border property.
The outline is not a part of the element's dimensions, therefore the element's width and height properties do not contain the width of the outline.
The numbers in the table specify the first browser version that fully supports the property.
| Property | |||||
|---|---|---|---|---|---|
| outline-width | 1.0 | 8.0 | 1.5 | 1.2 | 7.0 |
Note: IE8 supports the outline-width property only if a !DOCTYPE is specified.
| Value | Description | Play it |
|---|---|---|
| medium | Specifies a medium outline. This is default | Play it » |
| thin | Specifies a thin outline | Play it » |
| thick | Specifies a thick outline | Play it » |
| length | Allows you to define the thickness of the outline | Play it » |
| initial | Sets this property to its default value. Read about initial | Play it » |
| inherit | Inherits this property from its parent element. Read about inherit |
CSS tutorial: CSS Outline
CSS reference: outline property
HTML DOM reference: outlineWidth property
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