border-image-width CSS property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The border-image-width CSS property sets the width of an element's border image.
If this property's value is greater than the element's border-width, the border image will extend beyond the padding (and/or content) edge.
Try it
border-image-width: 30px;
border-image-width: 15px 40px;
border-image-width: 2.6rem;
border-image-width: 20% 8%;
<section id="default-example">
<div id="example-element">This is a box with a border around it.</div>
</section>
#example-element {
width: 80%;
height: 80%;
display: flex;
align-items: center;
justify-content: center;
padding: 50px;
background: #fff3d4;
color: black;
border: 30px solid;
border-image: url("../../../../../../shared-assets/images/examples/border-diamonds.png") 30
round;
font-size: 1.2em;
}
Syntax
css
/* Keyword value */
border-image-width: auto;
/* <length> value */
border-image-width: 1rem;
/* <percentage> value */
border-image-width: 25%;
/* <number> value */
border-image-width: 3;
/* top and bottom | left and right */
border-image-width: 2em 3em;
/* top | left and right | bottom */
border-image-width: 5% 15% 10%;
/* top | right | bottom | left */
border-image-width: 5% 2em 10% auto;
/* Global values */
border-image-width: inherit;
border-image-width: initial;
border-image-width: revert;
border-image-width: revert-layer;
border-image-width: unset;
The border-image-width property may be specified using one, two, three, or four values chosen from the list of values below.
- When one value is specified, it applies the same width to all four sides.
- When two values are specified, the first width applies to the top and bottom, the second to the left and right.
- When three values are specified, the first width applies to the top, the second to the left and right, the third to the bottom.
- When four values are specified, the widths apply to the top, right, bottom, and left in that order (clockwise).
Values
<length-percentage>-
The width of the border, specified as a
<length>or a<percentage>. Percentages are relative to the width of the border image area for horizontal offsets and the height of the border image area for vertical offsets. Must not be negative. <number>-
The width of the border, specified as a multiple of the corresponding
border-width. Must not be negative. auto-
The width of the border is made equal to the intrinsic width or height (whichever is applicable) of the corresponding
border-image-slice. If the image does not have the required intrinsic dimension, the correspondingborder-widthis used instead.
Formal definition
| Initial value | 1 |
|---|---|
| Applies to | all elements, except internal table elements when border-collapse is collapse. It also applies to ::first-letter. |
| Inherited | no |
| Percentages | refer to the width or height of the border image area |
| Computed value | as specified, but with relative lengths converted into absolute lengths |
| Animation type | by computed value type |
Formal syntax
border-image-width =
[ <length-percentage [0,∞]> | <number [0,∞]> | auto ]{1,4}
<length-percentage> =
<length> |
<percentage>
Examples
Tiling a border image
This example creates a border image using the following ".png" file, which is 90 by 90 pixels:
Thus, each circle in the source image is 30 by 30 pixels.
HTML
html
<p>
Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy
eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam
voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita
kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.
</p>
CSS
css
p {
border: 20px solid;
border-image: url("border.png") 30 round;
border-image-width: 16px;
padding: 40px;
}
Result
Specifications
| Specification |
|---|
| CSS Backgrounds and Borders Module Level 3 # border-image-width |
Browser compatibility
| desktop | mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
border-image-width
|
|
|
|
|
|
|
|
|
|
|
|
|
auto
|
|
|
|
|
|
|
|
|
|
|
|
|
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- See implementation notes.