mask-clip

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-clip CSS property determines the area which is affected by a mask. The painted content of an element must be restricted to this area.

Syntax

css
/* <coord-box> values */
mask-clip: content-box;
mask-clip: padding-box;
mask-clip: border-box;
mask-clip: fill-box;
mask-clip: stroke-box;
mask-clip: view-box;

/* Keyword values */
mask-clip: no-clip;

/* Non-standard keyword values */
-webkit-mask-clip: border;
-webkit-mask-clip: padding;
-webkit-mask-clip: content;
-webkit-mask-clip: text;

/* Multiple values */
mask-clip: padding-box, no-clip;
mask-clip: view-box, fill-box, border-box;

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

One or more of the keyword values listed below, separated by commas.

Values

content-box

The painted content is clipped to the content box.

padding-box

The painted content is clipped to the padding box.

border-box

The painted content is clipped to the border box.

fill-box

The painted content is clipped to the object bounding box.

stroke-box

The painted content is clipped to the stroke bounding box.

view-box

Uses the nearest SVG viewport as reference box. If a viewBox attribute is specified for the element creating the SVG viewport, the reference box is positioned at the origin of the coordinate system established by the viewBox attribute and the dimension of the reference box is set to the width and height values of the viewBox attribute.

no-clip

The painted content is not clipped.

border

This keyword behaves the same as border-box.

padding

This keyword behaves the same as padding-box.

content

This keyword behaves the same as content-box.

text

This keyword clips the mask image to the text of the element.

Formal definition

Initial valueborder-box
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-clip = 
  [ <coord-box> | no-clip ]#  

<coord-box> = 
  <paint-box>  |
  view-box     

<paint-box> = 
  <visual-box>  |
  fill-box      |
  stroke-box    

<visual-box> = 
  content-box  |
  padding-box  |
  border-box

Examples

Clipping a mask to the border box

Click "Play" in the live sample to open the code in the MDN Playground and change the mask-clip value to any of the allowed values described above.

html
<div class="masked"></div>
css
.masked {
  width: 100px;
  height: 100px;
  background-color: #8cffa0;
  margin: 20px;
  border: 20px solid #8ca0ff;
  padding: 20px;

  mask-image: url(https://mdn.github.io/shared-assets/images/examples/mdn.svg);
  mask-size: 100% 100%;
  mask-clip: border-box;
}

Specifications

Specification
CSS Masking Module Level 1
# the-mask-clip

Browser compatibility

BCD tables only load in the browser

See also