CSS - mask-clip

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.

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 */
}

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

Description  

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 valueborder-box
Applies toall elements; In SVG, it applies to container elements excluding the <defs> element and all graphics elements
Inheritedno
Mediavisual
Computed valueas specified
Animatableno
Canonical orderthe unique non-ambiguous order defined by the formal grammar

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. See bug 1251161.

Specifications  

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

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/css/mask-clip