border-image-slice CSS property.

Values: [<number> | <percentage>]{1,4} && fill?
Initial value: 100%
Applies to: All elements, except internal table elements when 'border-collapse' is 'collapse'
Inherit: no
Percentages: refer to size of the border image
Animatable:
Media: visual
Computed value:

CSS Standards

CSS 1
CSS 2
CSS 2.1
CSS 3
No
No
No
Yes