Regular Expression Cheatsheet

regex-cheatsheet.md

character	description	example
.	Wildcard - matches any character	/c.t/.test('cat'); => true /./.test(''); => false
^	Boundary - beginning of string	/^big/.test('big dog'); => true /^c/.test('abc'); => false
$	Boundary - end of string	/dog$/.test('big dog'); => true /a$/.test('abc'); => false
+	Character occurs 1 or more times	/ca+t/.test('caaat'); => true /ab+c/.test('ac'); => false
*	Character occurs 0 or more times	/ca*t/.test('ct'); => true /a*/.test(''); => true
|	Or (this or that)	/a|b/.test('b'); => true /at|og/.test('dog'); => true
\x	Hex codes (\x and then 2 digits, i.e. \x21 == '!')	/\x41/.test('a'); => true
( )	Parens - groups logic together	/(^a)|(^b)/.test('ax'); => true
\	Escape
\d	Numbers (0-9)
\s	Whitespace (spaces, newlines, tabs, etc.
\t	Tab character
\D	Negates lowercase version (no numbers)
\S	Negates lowercase version (non-whitespace)