Disallow invalid position @import
rules within a stylesheet.
a {}
@import 'foo.css';
/** ↑
* Invalid position */
The following patterns are considered violations:
a {}
@import 'foo.css';
@media print {}
@import 'foo.css';
The following patterns are not considered violations:
@import 'foo.css';
a {}
/* some comment */
@import 'foo.css';
@charset 'utf-8';
@import 'foo.css';