swc/crates/swc_css_prefixer/tests/fixture/placeholder-shown/output.css

a:-ms-input-placeholder {
  color: red;
}
a:placeholder-shown {
  color: red;
}
.SiteForm__input:not(:-ms-input-placeholder) {
  color: #828282;
}
.SiteForm__input:not(:placeholder-shown) {
  color: #828282;
}