Specify a blacklist of disallowed at-rules.
@keyframes name {}
/** ↑
* At-rules like this */array|string: "["array", "of", "unprefixed", "at-rules"]|"at-rule"
Given:
["extend", "keyframes"]The following patterns are considered warnings:
a { @extend placeholder; }@keyframes name {
from { top: 10px; }
to { top: 20px; }
}@-moz-keyframes name {
from { top: 10px; }
to { top: 20px; }
}The following patterns are not considered warnings:
@import "path/to/file.css";