border-image-outset

You’re reading the English version of this content since no translation exists yet for this locale. Bu makaleyi çevirmemize yardım edin!

The border-image-outset CSS property sets the distance by which an element's border image is set out from its border box.

The parts of the border image that are rendered outside the element's border box with border-image-outset do not trigger overflow scrollbars and don't capture mouse events.

Syntax

/* <length> value */
border-image-outset: 1rem;

/* <number> value */
border-image-outset: 1.5;

/* vertical | horizontal */
border-image-outset: 1 1.2;

/* top | horizontal | bottom */
border-image-outset: 30px 2 45px;

/* top | right | bottom | left */
border-image-outset: 7px 12px 14px 5px;

/* Global values */
border-image-outset: inherit;
border-image-outset: initial;
border-image-outset: unset;

The border-image-outset property may be specified as one, two, three, or four values. Each value is a <length> or <number>. Negative values are invalid and will cause the border-image-outset declaration to be ignored.

  1. If one value is specified, it applies to all four sides.
  2. If two values are specified, the first applies to the top and bottom and the second to the left and right.
  3. If three values are specified, the first applies to the top, the second to the left and right, and the third to the bottom.
  4. If four values are specified, they apply to the top, right, bottom, and left in that order (clockwise).

Values

<length>
The size of the border-image outset as a dimension — a number with a unit.
<number>
The size of the border-image outset as a multiple of the element's corresponding border-widths. For example, if an element has border-width: 1em 2px 0 1.5rem, and border-image-outset: 2, the final border-image-outset would be calculated as 2em 4px 0 3rem.

Formal syntax

[ <length> | <number> ]{1,4}

Example

HTML

<div id="outset">This element has an outset border image!</div>

CSS

#outset {
  width: 10rem;
  background: #cef;
  border: 1.4rem solid;
  border-image: radial-gradient(#ff2, #55f) 40;
  border-image-outset: 1.5;  /* 1.5 × 1.4rem = 2.1rem */
  margin: 2.1rem;
}

Result

Specifications

Specification Status Comment
CSS Backgrounds and Borders Module Level 3
The definition of 'border-image-outset' in that specification.
Candidate Recommendation Initial definition
Initial value0
Applies toall elements, except internal table elements when border-collapse is collapse. It also applies to ::first-letter.
Inheritedno
Mediavisual
Computed valueas specified, but with relative lengths converted into absolute lengths
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
border-image-outsetChrome Full support 15Edge Full support 12Firefox Full support 15IE Full support 11Opera Full support 15Safari Full support 6WebView Android Full support ≤37Chrome Android Full support 18Firefox Android Full support 15Opera Android ? Safari iOS Full support 6Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown