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mask-repeat

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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

Summary

The mask-repeat CSS property defines how mask images are repeated. A mask image can be repeated along the horizontal axis, the vertical axis, both axes, or not repeated at all.

By default, the repeated images are clipped to the size of the element, but they can be scaled to fit (using round) or evenly distributed from end to end (using space).

Initial valueno-repeat
Applies toall elements; In SVG, it applies to container elements excluding the <defs> element and all graphics elements
Inheritedno
Mediavisual
Computed valueConsists of two keywords, one per dimension
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Syntax

/* One-value syntax */
mask-repeat: repeat-x;
mask-repeat: repeat-y;
mask-repeat: repeat;
mask-repeat: space;
mask-repeat: round;
mask-repeat: no-repeat;

/* Two-value syntax: horizontal | vertical */
mask-repeat: repeat space;
mask-repeat: repeat repeat;
mask-repeat: round space;
mask-repeat: no-repeat round;

/* Multiple values */
mask-repeat: space round, no-repeat;
mask-repeat: round repeat, space, repeat-x;

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

Values

<repeat-style>
The one-value syntax is a shorthand for the full two-value syntax:
Single value Two-value equivalent
repeat-x repeat no-repeat
repeat-y no-repeat repeat
repeat repeat repeat
space space space
round round round
no-repeat no-repeat no-repeat
In the two-value syntax, the first value represents the horizontal repetition behavior and the second value represents the vertical behavior. Here is an explanation of how each option works for either direction:
repeat The image is repeated as much as needed to cover the whole mask painting area. The last image will be clipped if it doesn't fit.
space The image is repeated as much as possible without clipping. The first and last images are pinned to either side of the element, and whitespace is distributed evenly between the images. The mask-position property is ignored unless only one image can be displayed without clipping. The only case where clipping happens using space is when there isn't enough room to display one image.
round As the allowed space increases in size, the repeated images will stretch (leaving no gaps) until there is room for another one to be added. When the next image is added, all of the current ones compress to allow room. Example: An image with an original width of 260px, repeated three times, might stretch until each repetition is 300px wide, and then another image will be added. They will then compress to 225px.
no-repeat The image is not repeated (and hence the mask painting area will not necessarily be entirely covered). The position of the non-repeated mask image is defined by the mask-position CSS property.

Formal syntax

<repeat-style>#

where
<repeat-style> = repeat-x | repeat-y | [ repeat | space | round | no-repeat ]{1,2}

Examples

Single value

CSS Content

#masked {
  width: 250px;
  height: 250px;
  background: blue linear-gradient(red, blue);
  mask-image: url(https://mdn.mozillademos.org/files/12676/star.svg);
  mask-repeat: repeat; /* Can be changed in the live sample */
  margin-bottom: 10px;
}

Multiple mask image support

You can specify a different <repeat-style> for each mask image, separated by commas:

.examplethree {
  mask-image: url('mask1.png'), url('mask2.png');
  mask-repeat: repeat-x, repeat-y;
} 

Each image is matched with the corresponding repeat style, from first specified to last.

Specifications

Specification Status Comment
CSS Masking Level 1
The definition of 'mask-repeat' in that specification.
Candidate Recommendation Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 1.0-webkit No support[1] ? ? 4.0-webkit
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 2.1-webkit No support[1] ? ? 3.2-webkit

[1] Gecko currently doesn't implement this feature. It is only available in Nightly and Dev Edition. See bug 1251161.

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