Deprecated
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The deprecated compile() method is used to (re-)compile a regular expression during execution of a script. It is basically the same as the RegExp constructor.

Syntax

regexObj.compile(pattern, flags)

Parameters

pattern
The text of the regular expression.
flags

If specified, flags can have any combination of the following values:

g
global match
i
ignore case
m
multiline; treat beginning and end characters (^ and $) as working over multiple lines (i.e., match the beginning or end of each line (delimited by \n or \r), not only the very beginning or end of the whole input string)
y
sticky; matches only from the index indicated by the lastIndex property of this regular expression in the target string (and does not attempt to match from any later indexes).

Description

 The compile method is deprecated. You can just use the RegExp constructor to achieve the same effect.

Examples

Using compile()

The following example shows how to recompile a regular expression with a new pattern and a new flag.

var regexObj = new RegExp('foo', 'gi'); 
regexObj.compile('new foo', 'g');

Specifications

Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'RegExp.prototype.compile' in that specification.
Standard Initial definition. Defined in the (normative) Annex B for Additional ECMAScript Features for Web Browsers.
ECMAScript Latest Draft (ECMA-262)
The definition of 'RegExp.prototype.compile' in that specification.
Draft Defined in the (normative) Annex B for Additional ECMAScript Features for Web Browsers.

Browser compatibility

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
Basic support
Deprecated
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
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.

See also

Document Tags and Contributors

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