whitespace regex

\s            whitespace regex: [\r\n\t\f\v \u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]

\r            <Carriage Return> (CR)
\n            <End of Line> (EOL, LF, NL)
\t            <Character Tabulation> (HT, TAB)
\f            <Form Feed> (FF)
\v            <Line Tabulation> (VT)
              Space (SP)
\u00a0        No-Break Space (NBSP)
\u1680        Ogham Space Mark
\u2000-\u200a En Quad, Em Quad, En Space, Em Space, Three-Per-Em Space, Four-Per-Em Space, Six-Per-Em Space, Figure Space, Punctuation Space, Thin Space, Hair Space
\u2028        Line Separator
\u2029        Paragraph Separator
\u202f        Narrow No-Break Space (NNBSP)
\u205f        Medium Mathematical Space (MMSP)
\u3000        Ideographic Space
\ufeff        Zero Width No-Break Space (BOM, ZWNBSP)