maskBorder
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Syntax: <'mask-border-source'> || <'mask-border-slice'> [ / <'mask-border-width'>? [ / <'mask-border-outset'> ]? ]? || <'mask-border-repeat'> || <'mask-border-mode'>
| Chrome | Firefox | Safari | Edge | IE |
| :------------------------------: | :-----: | :----------------------------: | :-------------------------------: | :-: |
| 1 _(-webkit-mask-box-image)_ | No | 17.2 | 79 _(-webkit-mask-box-image)_ | No |
| | | 3.1 _(-webkit-mask-box-image)_ | | |Content copied to clipboard