mask-border-source
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The mask-border-source CSS property sets the source image used to create an element's mask border.
The mask-border-slice property is used to divide the source image into regions, which are then dynamically applied to the final mask border.
Syntax
/* Keyword value */
mask-border-source: none;
/* <image> values */
mask-border-source: url("image.jpg");
mask-border-source: linear-gradient(to top, red, yellow);
/* Global values */
mask-border-source: inherit;
mask-border-source: initial;
mask-border-source: revert;
mask-border-source: revert-layer;
mask-border-source: unset;
Values
Formal definition
| Initial value | none |
|---|---|
| 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, but with <url> values made absolute |
| Animation type | discrete |
Formal syntax
mask-border-source =
none |
<image>
<image> =
<url> |
<image()> |
<image-set()> |
<cross-fade()> |
<element()> |
<gradient>
<image()> =
image( <image-tags>? [ <image-src>? , <color>? ]! )
<image-set()> =
image-set( <image-set-option># )
<cross-fade()> =
cross-fade( <cf-image># )
<element()> =
element( <id-selector> )
<image-tags> =
ltr |
rtl
<image-src> =
<url> |
<string>
<image-set-option> =
[ <image> | <string> ] [ <resolution> || type( <string> ) ]?
<cf-image> =
[ <image> | <color> ] &&
<percentage [0,100]>?
<id-selector> =
<hash-token>
Examples
Basic usage
This property doesn't appear to be supported anywhere yet. When it eventually starts to be supported, it will serve to define the source of the border mask.
mask-border-source: url("image.jpg");
Chromium-based browsers support an outdated version of this property — mask-box-image-source — with a prefix:
-webkit-mask-box-image-source: url("image.jpg");
Note:
The mask-border page features a working example (using the out-of-date prefixed border mask properties supported in Chromium), so you can get an idea of the effect.
Specifications
| Specification |
|---|
| CSS Masking Module Level 1 # the-mask-border-source |
Browser compatibility
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