mozilla

border-image

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Summary

The border-image CSS property allows drawing an image on the borders of elements. This makes drawing complex looking widgets much simpler than it has been and removes the need for nine boxes in some cases. The border-image is used instead of the border styles given by the border-style properties.

It is important to note that if the computed value of border-image-source, which can be set either by border-image-source or the shorthand border-image, is none, or if the image cannot be displayed, the border styles will be used.

  • Initial value the concatenation of the initial values of its longhand properties:
    • border-image-source: none
    • border-image-slice: 100%
    • border-image-width: 1
    • border-image-outset: 0s
    • border-image-repeat: stretch
  • Applies to as each of the properties of the shorthand:
    • border-image-outset: all elements, except internal table elements when border-collapse is collapse
    • border-image-repeat: all elements, except internal table elements when border-collapse is collapse
    • border-image-slice: all elements, except internal table elements when border-collapse is collapse
    • border-image-source: all elements, except internal table elements when border-collapse is collapse
    • border-image-width: all elements, except table elements when border-collapse is collapse
    . It also applies to ::first-letter.
  • Inherited no
  • Percentages The values of its longhand properties the percentage value belongs to:
    • border-image-slice: refer to the size of the border image
    • border-image-width: refer to the width or height of the border image area
  • Media visual
  • Computed value as each of the properties of the shorthand:
    • border-image-outset: all lengths made absolute, otherwise as specified
    • border-image-repeat: as specified
    • border-image-slice: one to four percentage(s) (as specified) or absolute length(s), plus the keyword fill if specified
    • border-image-source: none or the image with its URI made absolute
    • border-image-width: all lengths made absolute, otherwise as specified
  • Animatable no
  • Canonical order the unique non-ambiguous order defined by the formal grammar

Syntax

/* image-source | height | width | repeat */
border-image: url("/images/border.png") 30 30 repeat;
border-image: url("/images/border.png") 30 30 stretch;

Values

See the respective properties for the different values.

Formal syntax

<'border-image-source'> || <'border-image-slice'> [ / <'border-image-width'> | / <'border-image-width'>? / <'border-image-outset'> ]? || <'border-image-repeat'>

Examples

Bitmap repeated (repeat)

The image is sliced and simply tiled to fill the border area.

  <div id="repeat">The image is tiled (repeated) to fill the area.</div>
#repeat { 
  border: 15px solid transparent;
  padding: 10px 20px;
  -moz-border-image:url("/files/4127/border.png") 30 30 repeat; /* Old Firefox */
  -webkit-border-image:url("/files/4127/border.png") 30 30 repeat; /* Safari */
  -o-border-image:url("/files/4127/border.png") 30 30 repeat; /* Opera */
  border-image:url("/files/4127/border.png") 30 30 repeat;
}

Live Sample:

Bitmap repeated (round)

The round option is a variation on the repeat option that distributes the tiles in such a way that the ends nicely connect.

  <div id="round">The image is tiled (repeated) to fill the area.</div>
#round { 
  border: 15px solid transparent;
  padding: 10px 20px;
  -moz-border-image:url("/files/4127/border.png") 30 30 round; /* Old Firefox */
  -webkit-border-image:url("/files/4127/border.png") 30 30 round; /* Safari */
  -o-border-image:url("/files/4127/border.png") 30 30 round; /* Opera */
  border-image:url("/files/4127/border.png") 30 30 round;
}

Live Sample:

Bitmap stretched

The 'stretch' option stretches the images to fill the border area.

  <div id="stretch">The image is stretched to fill the area.</div>
#stretch { 
  border: 15px solid transparent;
  padding: 10px 20px;
  -moz-border-image:url("/files/4127/border.png") 30 30 stretch; /* Old Firefox */
  -webkit-border-image:url("/files/4127/border.png") 30 30 stretch; /* Safari */
  -o-border-image:url("/files/4127/border.png") 30 30 stretch; /* Opera */
  border-image:url("/files/4127/border.png") 30 30 stretch;
}

Live Sample:

Specifications

Specification Status Comment
CSS Backgrounds and Borders Module Level 3
The definition of 'border-image' in that specification.
Candidate Recommendation  

Browser compatibility

Feature Firefox (Gecko) Chrome Internet Explorer Opera Safari
Basic support

3.5 (1.9.1)-moz [1]

Without prefix since 15 (15)

7.0-webkit

Without prefix since 16.0

11

10.5 / 11.0-o [2]

Without prefix since 15.0

3.0-webkit

Without prefix since 6.0

optional <border-image-slice> 15 (15) ? ? ? ?
fill keyword 15 (15) Yes ? Not supported 6
<gradient> 29.0 (29.0) (Yes) (Yes) (Yes)
Feature iOS Safari Opera Mini Opera Mobile Android Browser
Basic support

3.2 -webkit

Without prefix since 6.0

Not supported 11.0-o 2.1-webkit
optional <border-image-slice> ? Not supported ? ?
fill keyword 6 Not supported Not supported Yes(18)
<gradient> 29.0 (29.0) (Yes) (Yes) (Yes)
  • [1] An earlier version of the specification was implemented, prefixed, in Gecko versions prior to 15.
  • [2] For Opera, the prefixed property was added after the non-prefixed.

See also