CSS - mask-image
The mask-image
CSS property sets the image that is used as mask layer for an element.
Example
CSS Content
#masked { width: 100px; height: 100px; background-color: #8cffa0; mask-image: url(https://mdn.mozillademos.org/files/12676/star.svg); }
HTML Content
<div id="masked"></div>
Syntax
/* Keyword value */ mask-image: none; /* <mask-source> value */ mask-image: url(masks.svg#mask1); /* <image< values */ mask-image: linear-gradient(rgba(0, 0, 0, 1.0), transparent); mask-image: image(url(mask.png), skyblue); /* Multiple values */ mask-image: image(url(mask.png), skyblue), linear-gradient(rgba(0, 0, 0, 1.0), transparent); /* Global values */ mask-image: inherit; mask-image: initial; mask-image: unset;
Values
none
- This keyword is interpreted as a transparent black image layer.
<mask-source>
- A
<url>
reference to a<mask>
or to a CSS image. <image>
- An image value used as mask image layer.
Formal syntax
<mask-reference>#where
<mask-reference> = none | <image> | <mask-source>
where
<image> = <url> | <image()> | <image-set()> | <element()> | <cross-fade()> | <gradient>
<mask-source> = <url>where
<image()> = image( [ [ <image> | <string> ]? , <color>? ]! )
<image-set()> = image-set( <image-set-option># )
<element()> = element( <id-selector> )
<cross-fade()> = cross-fade( <cf-mixing-image> , <cf-final-image>? )
<gradient> = <linear-gradient()> | <repeating-linear-gradient()> | <radial-gradient()> | <repeating-radial-gradient()>where
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>
<image-set-option> = [ <image> | <string> ] <resolution>
<cf-mixing-image> = <percentage>? && <image>
<cf-final-image> = <image> | <color>
<linear-gradient()> = linear-gradient( [ <angle> | to <side-or-corner> ]? , <color-stop-list> )
<repeating-linear-gradient()> = repeating-linear-gradient( [ <angle> | to <side-or-corner> ]? , <color-stop-list> )
<radial-gradient()> = radial-gradient( [ <ending-shape> || <size> ]? [ at <position> ]? , <color-stop-list> )
<repeating-radial-gradient()> = repeating-radial-gradient( [ <ending-shape> || <size> ]? [ at <position> ]? , <color-stop-list> )where
<rgb()> = rgb( <rgb-component>#{3} )
<rgba()> = rgba( <rgb-component>#{3} , <alpha-value> )
<hsl()> = hsl( <hue>, <percentage>, <percentage> )
<hsla()> = hsla( <hue>, <percentage>, <percentage>, <alpha-value> )
<named-color> = <ident>
<deprecated-system-color> = ActiveBorder | ActiveCaption | AppWorkspace | Background | ButtonFace | ButtonHighlight | ButtonShadow | ButtonText | CaptionText | GrayText | Highlight | HighlightText | InactiveBorder | InactiveCaption | InactiveCaptionText | InfoBackground | InfoText | Menu | MenuText | Scrollbar | ThreeDDarkShadow | ThreeDFace | ThreeDHighlight | ThreeDLightShadow | ThreeDShadow | Window | WindowFrame | WindowText
<side-or-corner> = [ left | right ] || [ top | bottom ]
<color-stop-list> = <color-stop>{2,}
<ending-shape> = circle | ellipse
<size> = closest-side | farthest-side | closest-corner | farthest-corner | <length> | [ <length> | <percentage> ]{2}where
<rgb-component> = <integer> | <percentage>
<alpha-value> = <number>
<hue> = <number>
<color-stop> = <color> [ <percentage> | <length> ]?
Description
The mask-image
CSS property sets the image that is used as mask layer for an element.
Initial value | none |
---|---|
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, but with URIs made absolute |
Animatable | no |
Canonical order | the unique non-ambiguous order defined by the formal grammar |
Browser Compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Edge | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | 1.0-webkit[1] | No support[2] | No support | ? | (Yes)-webkit | 4.0-webkit[3] |
Multiple mask images | 1.0-webkit | No support[2] | No support | ? | (Yes)-webkit | 4.0-webkit |
SVG masks | 8.0 | No support[2] | No support | ? | (Yes)-webkit | 4.0-webkit |
Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|
Basic support | 2.1-webkit[4] | No support[2] | ? | No support | 3.2-webkit[5] |
Multiple mask images | (Yes)-webkit | No support[2] | ? | No support | (Yes)-webkit |
SVG masks | (Yes)-webkit | No support[2] | ? | No support | (Yes)-webkit |
[1] Implemented in version 8.0, Chrome initially only supported the -webkit
prefixed versions of gradients as values. Later, support for the unprefixed versions was added.
[2] This feature is not implemented yet. See bug 1251161.
[3] Implemented in version 4.0, Safari initially only supported the -webkit
prefixed versions of gradients as values.
[4] Android initially only supported the -webkit
prefixed versions of gradients as values.
[5] iOS Safari initially only supported the -webkit
prefixed versions of gradients as values.
Specifications
Specification | Status | Comment |
---|---|---|
CSS Masking Level 1 The definition of 'mask-image' 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-image