Character classes

In the following table, you can find the patterns for character classes, which tell the Regex to match a single character:

Pattern	Description	Example
.	This matches any character, except newline or another unicode line terminator, such as (\n, \r, \u2028 or \u2029).	/f.o/ matches "fao", "feo", and "foo"
\w	This matches any alphanumeric character, including the underscore. It is equivalent to [a-zA-Z0-9_].	/\w/ matches "f" in "foo"
\W	This matches any single nonword character. It is equivalent to [^a-zA-Z0-9_].	/\W/ matches "%"in "100%"
\d	This matches any single digit. It is equivalent to [0-9].	/\d/ matches "1" in "100"
\D	This matches any non digit. It is equivalent to [^0-9].	/\D/ matches "R" in "R2-D2"
\s	This matches any single space character. It is equivalent to [ \t\r\n\v\f].	/\s/ matches " " in "foo...