mask-border-repeat

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The mask-border-repeat CSS property sets how the edge regions of a source image are adjusted to fit the dimensions of an element's mask border.

Syntax

css
/* Keyword value */
mask-border-repeat: stretch;
mask-border-repeat: repeat;
mask-border-repeat: round;
mask-border-repeat: space;

/* top and bottom | left and right */
mask-border-repeat: round stretch;

/* Global values */
mask-border-repeat: inherit;
mask-border-repeat: initial;
mask-border-repeat: revert;
mask-border-repeat: revert-layer;
mask-border-repeat: unset;

The mask-border-repeat property may be specified using one or two values chosen from the list of values below.

  • When one value is specified, it applies the same behavior on all four sides.
  • When two values are specified, the first applies to the top and bottom, the second to the left and right.

Values

stretch

The source image's edge regions are stretched to fill the gap between each border.

repeat

The source image's edge regions are tiled (repeated) to fill the gap between each border. Tiles may be clipped to achieve the proper fit.

round

The source image's edge regions are tiled (repeated) to fill the gap between each border. Tiles may be stretched to achieve the proper fit.

space

The source image's edge regions are tiled (repeated) to fill the gap between each border. Extra space will be distributed in between tiles to achieve the proper fit.

Formal definition

Initial valuestretch
Applies toall elements; In SVG, it applies to container elements excluding the <defs> element and all graphics elements
Inheritedno
Computed valueas specified
Animation typediscrete

Formal syntax

mask-border-repeat = 
  [ stretch | repeat | round | space ]{1,2}

Examples

Basic usage

This property doesn't appear to be supported anywhere yet. When it eventually starts to be supported, it will serve to define how the border mask slice will repeat around the border — i.e. will it just repeat, or be scaled slightly so a whole number of slices fits, or be stretched so one slice fits?

css
mask-border-repeat: round;

Chromium-based browsers support an outdated version of this property — mask-box-image-repeat — with a prefix:

css
-webkit-mask-box-image-repeat: round;

Note: The mask-border page features a working example (using the out-of-date prefixed border mask properties supported in Chromium), so you can get an idea of the effect.

Specifications

Specification
CSS Masking Module Level 1
# the-mask-border-repeat

Browser compatibility

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See also