Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The non-standard lastMatch property is a static and read-only property of regular expressions that contains the last matched characters. RegExp.$& is an alias for this property.

Syntax

RegExp.lastMatch
RegExp['$&']

Description

The lastMatch property is static, it is not a property of an individual regular expression object. Instead, you always use it as RegExp.lastMatch or RegExp['$&'].

The value of the lastMatch property is read-only and modified whenever a successful match is made.

You can not use the shorthand alias with the dot property accessor (RegExp.$&), because the parser expects an expression with "&" in that case and a SyntaxError is thrown. Use the bracket notation for property access.

Examples

Using lastMatch and $&

var re = /hi/g;
re.test('hi there!');
RegExp.lastMatch; // "hi"
RegExp['$&'];     // "hi"

Specifications

Non-standard. Not part of any current specification.

Browser compatibility

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
Basic support
Non-standard
Chrome Full support YesEdge Full support YesFirefox Full support 1IE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support 4Opera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yesnodejs Full support Yes

Legend

Full support  
Full support
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.

See also

Document Tags and Contributors

Contributors to this page: fscholz, jameshkramer, nmve
Last updated by: fscholz,