W3cubDocs

/JavaScript

regExp.dotAll

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

Description

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")
  • U+2028 LINE SEPARATOR
  • U+2029 PARAGRAPH SEPARATOR

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.

Examples

Using dotAll

var str1 = 'bar\nexample foo example'; 

var regex1 = new RegExp('bar.example','s');

console.log(regex1.dotAll); // Output: true

console.log(str1.replace(regex1,'')); // Output: foo example

var str2 = 'bar\nexample foo example';

var regex2 = new RegExp('bar.example');

console.log(regex2.dotAll); // Output: false

console.log(str2.replace(regex2,'')); // Output: bar
                                      //         example foo example

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
dotAll 62 79 78 No 49 12
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
dotAll 62 62 No 46 12 8.0
Server
Node.js
dotAll 8.10.0
8.10.0
8.3.0
Disabled
Disabled From version 8.3.0: this feature is behind the --harmony runtime flag.

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/dotAll