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CSS border-image-outset Property

The border-image-outset property specifies the amount by which the border image area extends beyond the border box.

Portions of the border image that are rendered outside the border box as a result of this property do not trigger scrolling.

CSS Demo: border-image-outset

border-image-outset: 0;
border-image-outset: 15px;
border-image-outset: 30px;
border-image-outset: 15px 30px;
border-image-outset: 20px 20px 50px 20px;
This is a box with a border around it

The border-image-outset property can have from one to four values:

  • When one value is specified, it applies the same outset to all four sides
  • When two values are specified, the first outset applies to the top and bottom, the second to the left and right
  • When three values are specified, the first outset applies to the top, the second to the left and right, the third to the bottom
  • When four values are specified, the outsets apply to the top, right, bottom, and left in that order (clockwise)

Technical Details

Default value 0
Applies to all elements, except internal table elements when border-collapse is collapse
Inherited no
Computed value as specified, but with relative lengths converted into absolute lengths
Animatable no See animatable properties.
Version CSS3
JavaScript syntax object.style.borderImageOutset = "20px"


CSS Syntax:

border-image-outset: length|number|initial|inherit;

Examples

The following example shows how to use border-image-outset property:

Run code

Browser compatibility

The numbers in the table specify the first browser version that fully supports the border-image-outset property.

Numbers followed by -webkit-, -moz- and -o- specify the first version that worked with a vendor prefix.

Property
border-image-outset 16
4 -webkit-
15
3.5 -moz-
15
11 -o-
6
3.1 -webkit-
11

Property Values

The following table describes the values of border-image-outset property:

Value Description
length A length unit specifying how far from the edges the border-image will appear. See length units
number Represent multiples of the corresponding border-width
initial Sets this property to its default value
inherit Inherits this property from its parent element

See also

CSS Border Image tutorial

CSS border-image property

CSS border-image-width property