mask-border-outset
Defines how much the mask border area extends beyond the element's border box, effectively pushing the mask outwards.
Quick example
.masked-element {
/* Extends the mask 10px beyond the element edges */
mask-border-outset: 10px;
}Quick facts
Initial value
0Inherited
No
Applies to
all elements and SVG container elements
Animation type
discrete
mask-border-outset Browser Support
Widely available Since 2015 92% global usage
This feature is well established and works across many devices and browser versions. It has been available across browsers since 2015.
Safe to use without fallbacks.
1+
17.2+
79+