mask-border-slice property is used to divide the source image into regions, which are then dynamically applied to the final mask border.
/* 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;
No mask border is used.
Image reference to use for the mask border.
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.
Chromium-based browsers support an outdated version of this property —
mask-box-image-source — with a prefix:
mask-border page features a working example (using the out-of-date prefixed border mask properties supported in Chromium), so you can get an idea of the effect.
|CSS Masking Module Level 1 |
BCD tables only load in the browser