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border-image-width

files/en-us/web/css/reference/properties/border-image-width/index.md

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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 {{cssxref("border-width")}}, the border image will extend beyond the padding (and/or content) edge.

{{InteractiveExample("CSS Demo: border-image-width")}}

css
border-image-width: 30px;
css
border-image-width: 15px 40px;
css
border-image-width: 2.6rem;
css
border-image-width: 20% 8%;
html
<section id="default-example">
  <div id="example-element">This is a box with a border around it.</div>
</section>
css
#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 {{cssxref("<length>")}} or a {{cssxref("<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 {{cssxref("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 {{cssxref("border-image-slice")}}. If the image does not have the required intrinsic dimension, the corresponding border-width is used instead.

Formal definition

{{CSSInfo}}

Formal syntax

{{csssyntax}}

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

{{EmbedLiveSample('Tiling_a_border_image', 200, 240)}}

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also