Javascript Regular Expressions

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 bar"
`\S`	This matches any single nonspace character. It is equivalent to `[^ \t\r\n\v\f]`.	`/\S/` matches "foo" in "foo bar"

In the following table, you can find the patterns for literal characters, which tell the Regex to match a special character:

Pattern	Description	Example
`Alphanumeric`	These match themselves literally.	`/javascript book/` matches "javascript book" in "javascript book"
`\0`	This matches a `NUL` character.
`\n`	This matches a newline character.
`\f`	This matches a form feed character.
`\r`	This matches a carriage return character.
`\t`	This matches a tab character.
`\v`	This matches a vertical tab character.
`[\b]`	This matches a backspace character.
`\xxx`	This matches the ASCII character, expressed by the `xxx` octal number.	`/112/` matches the "J" character
`\xdd`	This matches the ASCII character, expressed by the `dd` hex number.	`/x4A/` matches the "J" character
`\uxxxx`	This matches the ASCII character, expressed by the `xxxx` UNICODE.	`/u0237/` matches the "J" character
`\`	This indicates whether the next character is special and is not to be interpreted literally.	`/\^/` matches "^" in "char ^"

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