@charsetThe @charset CSS at-rule specifies the character encoding of an external style sheet.cssCSSwidely2015-07-292018-01-29https://drafts.csswg.org/css2/#charsethttps://developer.mozilla.org/docs/Web/CSS/Reference/At-rules/@charsetcss.at-rules.charsethttps://nowyoucanuse.com/features--charset.html