[Feature Request] Ability to use @extend with :is

[ggedde]

Is there a way to do this currently?
if not then I would like to request it. Maybe @extend-is, etc.

Example:

%ui {
  color: blue;
  &:hover {
    color: red
  }
}

button {
  @extend-is %ui;
}
a {
  @extend-is %ui;
}
.badge {
  @extend-is %ui;
}

Output as:

:is(button,a,.badge) {
  color: blue;
}
:is(button,a,.badge):hover {
  color: red;
}

Instead of:

button,
a,
.badge {
  color: blue;
}
button:hover,
a:hover,
.badge:hover {
  color: red;
}

[nex3]

Duplicate of sass/sass#1136