mask-position
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-position
CSS property sets the initial position, relative to the mask position layer set by mask-origin
, for each defined mask image.
Syntax
css
/* Keyword values */
mask-position: top;
mask-position: bottom;
mask-position: left;
mask-position: right;
mask-position: center;
/* <position> values */
mask-position: 25% 75%;
mask-position: 0px 0px;
mask-position: 10% 8em;
/* Multiple values */
mask-position: top right;
mask-position:
1rem 1rem,
center;
/* Global values */
mask-position: inherit;
mask-position: initial;
mask-position: revert;
mask-position: revert-layer;
mask-position: unset;
One or more <position>
values, separated by commas.
Values
<position>
-
One to four values representing a 2D position regarding the edges of the element's box. Relative or absolute offsets can be given. Note that the position can be set outside of the element's box.
Formal definition
Initial value | 0% 0% |
---|---|
Applies to | all elements; In SVG, it applies to container elements excluding the <defs> element and all graphics elements |
Inherited | no |
Percentages | refer to size of mask painting area minus size of mask layer image (see the text for background-position ) |
Computed value | Consists of two keywords representing the origin and two offsets from that origin, each given as an absolute length (if given a <length>), otherwise as a percentage. |
Animation type | a repeatable list |
Formal syntax
mask-position =
<position>#
<position> =
[ left | center | right | top | bottom | <length-percentage> ] |
[ left | center | right ] && [ top | center | bottom ] |
[ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ] |
[ [ left | right ] <length-percentage> ] && [ [ top | bottom ] <length-percentage> ]
<length-percentage> =
<length> |
<percentage>
Examples
Setting mask position
Click "Play" in the live sample to open the code in the MDN Playground and change the mask-position
value to any of the allowed values detailed above.
html
<div id="wrapper">
<div class="masked"></div>
</div>
css
#wrapper {
border: 1px solid black;
width: 250px;
height: 250px;
}
.masked {
width: 250px;
height: 250px;
margin-bottom: 10px;
background: blue linear-gradient(red, blue);
mask-image: url(https://mdn.github.io/shared-assets/images/examples/mask-star.svg);
mask-repeat: no-repeat;
mask-position: top right;
}
Specifications
Specification |
---|
CSS Masking Module Level 1 # the-mask-position |
Browser compatibility
BCD tables only load in the browser