maskBorderWidth
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Syntax: [ <length-percentage> | <number> | auto ]{1,4}
Initial value: auto
| Chrome | Firefox | Safari | Edge | IE |
| :------------------------------------: | :-----: | :----------------------------------: | :-------------------------------------: | :-: |
| 1 _(-webkit-mask-box-image-width)_ | No | 17.2 | 79 _(-webkit-mask-box-image-width)_ | No |
| | | 3.1 _(-webkit-mask-box-image-width)_ | | |Content copied to clipboard