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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 Module 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	53.0 (53.0)	No support	(Yes)-webkit	(Yes)-webkit
`border`, `padding`, `content`, `text`	1.0-webkit	?	No support	(Yes)	4.0-webkit

Feature	Android	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile
Basic support	?	53.0 (53.0)	No support	?	?
`border`, `padding`, `content`, `text`	2.1-webkit	?	No support	?	3.2-webkit

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https://developer.mozilla.org/en-US/docs/Web/CSS/mask-clip