Web/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.

/* <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;

Syntax

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.
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 definition

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
Computed value	as specified
Animation type	discrete

Formal syntax

[ <geometry-box> | no-clip ]#where <geometry-box> = <shape-box> | fill-box | stroke-box | view-boxwhere <shape-box> = <box> | margin-boxwhere <box> = border-box | padding-box | content-box

Examples

Clipping a mask to the border box

Change the mask-clip value to any of the allowed values detailed above. If viewing the example in a Chromium-based browser change the value of -webkit-mask-clip.

Specifications

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

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`mask-clip`	Chrome Full support 1 Prefixed' Full support 1 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Edge Full support 79 Prefixed' Full support 79 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Firefox Full support 53 Full support 53 No support 20 — 53 Disabled' Disabled' From version 20 until version 53 (exclusive): this feature is behind the `layout.css.masking.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 15 Prefixed' Full support 15 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Safari Full support 4 Prefixed' Full support 4 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	WebView Android Full support 2 Prefixed' Full support 2 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Chrome Android Full support 18 Prefixed' Full support 18 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Firefox Android Full support 53 Full support 53 No support 20 — 53 Disabled' Disabled' From version 20 until version 53 (exclusive): this feature is behind the `layout.css.masking.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android Full support 14 Prefixed' Full support 14 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Safari iOS Full support 3.2 Prefixed' Full support 3.2 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Samsung Internet Android Full support 1.0 Prefixed' Full support 1.0 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-
`border` Non-standard'	Chrome Full support 1	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 15	Safari Full support 4	WebView Android Full support 2	Chrome Android Full support 18	Firefox Android No support No	Opera Android Full support 14	Safari iOS Full support 3.2	Samsung Internet Android Full support 1.0
`content</content>` Non-standard'	Chrome Full support 1	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 15	Safari Full support 4	WebView Android Full support 2	Chrome Android Full support 18	Firefox Android No support No	Opera Android Full support 14	Safari iOS Full support 3.2	Samsung Internet Android Full support 1.0
`padding` Non-standard'	Chrome Full support 1	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 15	Safari Full support 4	WebView Android Full support 2	Chrome Android Full support 18	Firefox Android No support No	Opera Android Full support 14	Safari iOS Full support 3.2	Samsung Internet Android Full support 1.0
`text` Non-standard'	Chrome Full support 1	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 15	Safari Full support 4	WebView Android Full support 2	Chrome Android Full support 18	Firefox Android No support No	Opera Android Full support 14	Safari iOS Full support 3.2	Samsung Internet Android Full support 1.0

Legend

Full support: Full support
No support: No support
Non-standard. Expect poor cross-browser support.': Non-standard. Expect poor cross-browser support.
User must explicitly enable this feature.': User must explicitly enable this feature.
Requires a vendor prefix or different name for use.': Requires a vendor prefix or different name for use.

mask-clip by Mozilla Contributors is licensed under CC-BY-SA 2.5.