maskBorderOutset
The mask-border-outset CSS property specifies the distance by which an element's mask border is set out from its border box.
Syntax: [ <length> | <number> ]{1,4}
Initial value: 0
| Chrome | Firefox | Safari | Edge | IE |
| :-------------------------------------: | :-----: | :-----------------------------------: | :--: | :-: |
| 1 _(-webkit-mask-box-image-outset)_ | No | 17.2 | n/a | No |
| | | 3.1 _(-webkit-mask-box-image-outset)_ | | |Content copied to clipboard