border-image-outset | CSS CSS Properties

Controls how far outside the element's actual box the border image is drawn. It's useful for making a decorative border appear as if it's 'floating' around its container.

Quick example

.fancy-container {
  border: 10px solid transparent;
  border-image-source: url('frame.png');
  border-image-slice: 30;
  /* Extends the image 5px beyond the box */
  border-image-outset: 5px;
}

Quick facts

Initial value

0

Inherited

Applies to

all elements (except table elements when collapse)

Animation type

byComputedValueType

Values

lengthnumber

border-image-outset Browser Support

Widely available Since 2017 96% global usage

This feature is well established and works across many devices and browser versions. It has been available across browsers since 2017.

Safe to use without fallbacks.

View on caniuse.com → View on MDN → View on webstatus.dev → Learn more about Baseline →

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