JS RegExp Methods

JavaScript Notes · CodingNow 2.02 min readSource

Complete RexExp Reference

Revised July 2025

Col 1	Col 2
Name	Description
compile()	Compiles a regular expression (Deprecated)
constructor	Returns the function that created the RegExp prototype
dotAll	Returns `true` if the s flag is set in the expression (new in 2018)
escape()	Returns a string where characters that belongs to the regular expression syntax are escaped (new in 2025)
exec()	Returns a result array for a matches in a string
flags	Returns the modifiers set in the expression (new in 2015)
global	Returns `true` if the g flag is set in the expression
hasIndices	Returns `true` if the d flag is set (new in 2022)
ignoreCase	Returns `true` if the i flag is set
lastIndex	Specifies the index at which to start the next match
multiline	Returns `true` if the m modifier is set
source	Returns the text of the RegExp pattern
sticky	Returns `true` if the y flag is set (new in 2015)
test()	Tests for a match in a string. Returns `true` or `false`
toString()	Returns the string value of the regular expression
unicode	Returns `true` if the u flag is set (new in 2018)
unicodeSets	Returns `true` if the v flag is set (new in 2023)

RegExp String Methods

Col 1	Col 2
Method	Description
match(regexp)	Returns an Array of results
matchAll(regexp)	Returns an Iterator of results
replace(regexp, s)	Returns a new String
replaceAll(regexp, s)	Returns a new String
search(regexp)	Returns the index of the first match
split(regexp)	Returns an Array of results

Note: See Also: JavaScript RegExp Tutorial JavaScript RegExp Flags JavaScript RegExp Character Classes JavaScript RegExp Meta Characters JavaScript RegExp Assertions JavaScript RegExp Groups JavaScript RegExp Quantifiers JavaScript RegExp Patterns JavaScript RegExp Objects

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