maskBorderWidth
The mask-border-width CSS property sets the width of an element's mask border.
Syntax: [ <length-percentage> | <number> | auto ]{1,4}
Initial value: auto
| Chrome | Firefox | Safari | Edge | IE |
| :------------------------------------: | :-----: | :----------------------------------: | :--: | :-: |
| 1 _(-webkit-mask-box-image-width)_ | No | 17.2 | n/a | No |
| | | 3.1 _(-webkit-mask-box-image-width)_ | | |Content copied to clipboard