autoprefixer/test/cases/supports.css

@supports
  (cursor: grab) or
  not (mask: none) and
  (color: black) {
  a {
    color: black;
  }
}

@supports not (display: flex) {
  a {
    color: #000;
  }
}

@supports ((perspective: 1px) and (not (-webkit-overflow-scrolling: touch))) {
  a {
    color: #000;
  }
}

@supports (animation-name: test) and ((animation-timing-function: steps(4, end)) or (animation-timing-function: step-end)) {
  animation-name: test;
}

@supports (transition: color 1s) {
  transition: color 1s;
}