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The dotAll property indicates whether or not the "s" flag is used with the regular expression. dotAll is a read-only property of an individual regular expression instance.

Property attributes of RegExp.prototype.dotAll
Writable no
Enumerable no
Configurable yes


The value of dotAll is a Boolean and true if the "s" flag was used; otherwise, false. The "s" flag indicates that the dot special character (".") should additionally match the following line terminator ("newline") characters in a string, which it would not match otherwise:

  • U+000A LINE FEED (LF) ("\n")
  • U+000D CARRIAGE RETURN (CR) ("\r")

This effectively means the dot will match any character on the Unicode Basic Multilingual Plane (BMP). To allow it to match astral characters, the "u" (unicode) flag should be used. Using both flags in conjunction allows the dot to match any Unicode character, without exceptions.

You cannot change this property directly.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
dotAllChrome Full support 62Edge No support NoFirefox No support NoIE No support NoOpera Full support 49Safari Full support 12WebView Android Full support 62Chrome Android Full support 62Firefox Android No support NoOpera Android Full support 46Safari iOS Full support 12Samsung Internet Android Full support Yesnodejs Full support 8.10.0
Full support 8.10.0
Full support 8.3.0
Disabled From version 8.3.0: this feature is behind the --harmony runtime flag.


Full support  
Full support
No support  
No support
User must explicitly enable this feature.
User must explicitly enable this feature.

See also