Pattern: Deprecated at-rule
Issue: -
This rule flags at-rules that were removed or deprecated after being in the CSS specifications, including editor drafts, and were subsequently either:
shipped in a stable version of a browser
shipped by a developer channel/edition browser
shipped but behind experimental flags
polyfilled with some adoption before any browser actually shipped
had an MDN page at one point in time
The following patterns are considered violations:
@viewport {}a { @apply foo; }The following patterns are not considered violations:
@starting-style {}a { @layer {} }