Property mask

The mask CSS shorthand property hides an element (partially or fully) by masking or clipping the image at specific points.

Syntax

/* Keyword values */
mask: none;

/* Image values */
mask: url(mask.png); /* Pixel image used as mask */
mask: url(masks.svg#star); /* Element within SVG graphic used as mask */

/* Combined values */
mask: url(masks.svg#star) luminance; /* Element within SVG graphic used as luminance mask */
mask: url(masks.svg#star) 40px 20px; /* Element within SVG graphic used as mask positioned 40px from the top and 20px from the left */
mask: url(masks.svg#star) 0 0/50px 50px; /* Element within SVG graphic used as mask with a width and height of 50px */
mask: url(masks.svg#star) repeat-x; /* Element within SVG graphic used as horizontally repeated mask */
mask: url(masks.svg#star) stroke-box; /* Element within SVG graphic used as mask extending to the box enclosed by the stroke */
mask: url(masks.svg#star) exclude; /* Element within SVG graphic used as mask and combined with background using non-overlapping parts */

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

/* Multiple masks */
mask:
  url(masks.svg#star) left / 16px repeat-y,
  /* Element within SVG graphic is used as a mask on the left-hand side with a width of 16px */
    url(masks.svg#circle) right / 16px repeat-y; /* Element within SVG graphic is used as a mask on the right-hand side with a width of 16px */

Example

.target {
  mask: url(#c1) luminance;
}

.another-target {
  mask: url(resources.svg#c1) 50px 30px/10px 10px repeat-x exclude;
}