mask

Baseline 2023

Newly available

Since ⁨December 2023⁩, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

The mask attribute is a presentation attribute mainly used to bind a given <mask> element with the element the attribute belongs to.

Note: As a presentation attribute, mask also has a CSS property counterpart: mask. When both are specified, the CSS property takes priority.

You can use this attribute with the following SVG elements:

Example

html,
body,
svg {
  height: 100%;
}

html

<svg viewBox="0 0 200 100" xmlns="http://www.w3.org/2000/svg">
  <mask id="myMask" maskContentUnits="objectBoundingBox">
    <rect fill="white" x="0" y="0" width="100%" height="100%" />
    <polygon
      fill="black"
      points="0.5,0.2 0.68,0.74 0.21,0.41 0.79,0.41 0.32,0.74" />
  </mask>

  <!--
  Punch a hole in a shape of a star inside the red circle,
  revealing the yellow circle underneath
  -->
  <circle cx="50" cy="50" r="20" fill="yellow" />
  <circle cx="50" cy="50" r="45" fill="red" mask="url(#myMask)" />
</svg>

Since SVG2, the mask attribute is defined as a CSS property and is a shorthand for many other properties: mask-image, mask-mode, mask-repeat, mask-position, mask-clip, mask-origin, mask-size, and mask-composite.