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mask-clip

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.

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.

Initial value border-box
Applies to all elements; In SVG, it applies to container elements excluding the <defs> element and all graphics elements
Inherited no
Media visual
Computed value as specified
Animation type discrete
Canonical order the unique non-ambiguous order defined by the formal grammar

Syntax

/* <geometry-box> values */
mask-clip: content-box;
mask-clip: padding-box;
mask-clip: border-box;
mask-clip: margin-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: unset;

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.
margin-box
The painted content is clipped to the margin 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 syntax

[ <geometry-box> | no-clip ]#

where
<geometry-box> = <shape-box> | fill-box | stroke-box | view-box

where
<shape-box> = <box> | margin-box

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

Example

CSS Content

#masked {
  width: 100px;
  height: 100px;
  background-color: #8cffa0;
  margin: 20px;
  border: 20px solid #8ca0ff;
  padding: 20px;
  mask-image: url(https://mdn.mozillademos.org/files/12668/MDN.svg);
  mask-size: 100% 100%;
  mask-clip: border-box; /* Can be changed in the live sample */
}

Specifications

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

Browser compatibility

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

[1] This feature is not implemented yet. It is only available in Nightly and Dev Edition. See bug 1251161.

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/mask-clip