/foobar/
/fo[o](?=bar)/
/\/\\\[\]/
/(fo|o?)+b*ar?/

----------------------------------------------------

[
	["regex", "/foobar/"],
	["regex", "/fo[o](?=bar)/"],
	["regex", "/\\/\\\\\\[\\]/"],
	["regex", "/(fo|o?)+b*ar?/"]
]

----------------------------------------------------

Checks for regexes.