# no-irregular-whitespace Disallow irregular whitespaces. ```css .firstClass .secondClass {} /** ↑ * Irregular whitespace. Selector would fail to match '.firstClass' */ ``` ## Options ### `true` The following patterns are considered violations: ```css .firstClass .secondClass {} ``` The following patterns are _not_ considered violations: ```css .firstClass .secondClass { /* Writing comments with irregular whitespaces */ } ``` ## Unicode reference of irregular whitespaces ``` \u000B - Line Tabulation (\v) - \u000C - Form Feed (\f) - \u00A0 - No-Break Space - \u0085 - Next Line \u1680 - Ogham Space Mark \u180E - Mongolian Vowel Separator - \uFEFF - Zero Width No-Break Space - \u2000 - En Quad \u2001 - Em Quad \u2002 - En Space - \u2003 - Em Space - \u2004 - Tree-Per-Em \u2005 - Four-Per-Em \u2006 - Six-Per-Em \u2007 - Figure Space \u2008 - Punctuation Space - \u2009 - Thin Space \u200A - Hair Space \u200B - Zero Width Space - \u2028 - Line Separator \u2029 - Paragraph Separator \u202F - Narrow No-Break Space \u205F - Medium Mathematical Space \u3000 - Ideographic Space ```