Regular expressionsBaseline · Widely available

The RegExp object represents a regular expression, a notation for matching text patterns.

Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Jul 29, 2015. Widely available since Jan 29, 2018.

How to use ↓Compare browsers

Browser support

DesktopChrome

1+Supportedsince Dec 11, 2008

Current: 155

Edge

12+Supportedsince Jul 29, 2015

Current: 154

Firefox

1+Supportedsince Nov 9, 2004

Current: 157

Safari

1+Supportedsince Jun 23, 2003

Current: 27

MobileChrome Android

18+Supportedsince Jun 27, 2012

Current: 155

Firefox Android

4+Supportedsince Mar 29, 2011

Current: 157

Safari iOS

1+Supportedsince Jun 29, 2007

Current: 27

How to use

This feature is Baseline widely available — use it freely, no fallback needed.

Example

Full syntax and examples are on MDN: RegExp.

Feature detection

JS · check before using

if (typeof RegExp !== "undefined") {
  // RegExp is available
}

Documentation (MDN)

Specification

tc39.es#sec-regexp-regular-expression-objects ↗

Sub-features

Support for each part of the feature (52). The overall table above shows when the whole feature works.

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
RegExp	1	12	1	1	18	4	1
RegExp.@@match	50	13	49	10	50	49	10
RegExp.@@matchAll	73	79	67	13	73	67	13
RegExp.@@replace	50	79	49	10	50	49	10
RegExp.@@search	50	13	49	10	50	49	10
RegExp.@@species	51	13	49	10	51	49	10
RegExp.@@split	50	79	49	10	50	49	10
RegExp.RegExp	1	12	1	1	18	4	1
RegExp.dotAll	62	79	78	11.1	62	79	11.3
RegExp.exec	1	12	1	1	18	4	1
RegExp.flags	49	79	37	9	49	37	9
RegExp.global	1	12	1	1	18	4	1
RegExp.global.prototype_accessor	48	12	38	1.3	48	38	1
RegExp.hasIndices	90	90	88	15	90	88	15
RegExp.ignoreCase	1	12	1	1	18	4	1
RegExp.ignoreCase.prototype_accessor	48	12	38	1.3	48	38	1
RegExp.lastIndex	1	12	1	1	18	4	1
RegExp.multiline	1	12	1	1	18	4	1
RegExp.multiline.prototype_accessor	48	12	38	1.3	48	38	1
RegExp.source	1	12	1	1	18	4	1

Show 32 more

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
RegExp.source.empty_regex_string	6	12	38	5	18	38	4.2
RegExp.source.escaping	73	12	38	6	73	38	6
RegExp.source.prototype_accessor	48	12	41	1.3	48	41	1
RegExp.sticky	49	13	3	10	49	4	10
RegExp.sticky.anchored_sticky_flag	49	13	44	10	49	44	10
RegExp.sticky.prototype_accessor	49	13	38	10	49	38	10
RegExp.test	1	12	1	1	18	4	1
RegExp.toString	1	12	1	1	18	4	1
RegExp.toString.escaping	73	12	38	6	73	38	6
RegExp.unicode	50	12	46	10	50	46	10
RegExp.unicodeSets	112	112	116	17	112	116	17
regular_expression_literals	1	12	1	1	18	4	1
javascript.regular_expressions.backreference	1	12	1	1	18	4	1
javascript.regular_expressions.capturing_group	1	12	1	1	18	4	1
javascript.regular_expressions.character_class	1	12	1	1	18	4	1
javascript.regular_expressions.character_class_escape	1	12	1	1	18	4	1
javascript.regular_expressions.character_escape	1	12	1	1	18	4	1
javascript.regular_expressions.character_escape.unicode	50	12	46	10	50	46	10
javascript.regular_expressions.disjunction	1	12	1	1	18	4	1
javascript.regular_expressions.input_boundary_assertion	1	12	1	1	18	4	1
javascript.regular_expressions.literal_character	1	12	1	1	18	4	1
javascript.regular_expressions.lookahead_assertion	1	12	1	1	18	4	1
javascript.regular_expressions.lookbehind_assertion	62	79	78	16.4	62	79	16.4
javascript.regular_expressions.modifier	125	125	132	26	125	132	26
javascript.regular_expressions.named_backreference	64	79	78	11.1	64	79	11.3
javascript.regular_expressions.named_capturing_group	64	79	78	11.1	64	79	11.3
javascript.regular_expressions.named_capturing_group.duplicate_named_capturing_groups	125	125	129	17	125	129	17
javascript.regular_expressions.non_capturing_group	1	12	1	1	18	4	1
javascript.regular_expressions.quantifier	1	12	1	1	18	4	1
javascript.regular_expressions.unicode_character_class_escape	64	79	78	11.1	64	79	11.3
javascript.regular_expressions.wildcard	1	12	1	1	18	4	1
javascript.regular_expressions.word_boundary_assertion	1	12	1	1	18	4	1