Already prefixed mask-image results in two prefixed declarations #237
Description
.foo {
-webkit-mask-image: url("x.svg");
mask-image: url("x.svg");
}results in
.foo {
-webkit-mask-image: url("x.svg");
-webkit-mask-image: url("x.svg");
mask-image: url("x.svg");
}Not sure if this is an isolated problem with mask-image or if this applies to other features as well.
