RegExp.prototype.multiline

The multiline accessor property of RegExp instances returns whether or not the m flag is used with this regular expression.

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Description

RegExp.prototype.multiline has the value true if the m flag was used; otherwise, false. The m flag indicates that a multiline input string should be treated as multiple lines. For example, if m is used, ^ and $ change from matching at only the start or end of the entire string to the start or end of any line within the string.

The set accessor of multiline is undefined. You cannot change this property directly.

Examples

Using multiline

js
const regex = /foo/m;

console.log(regex.multiline); // true

Specifications

Specification
ECMAScript Language Specification
# sec-get-regexp.prototype.multiline

Browser compatibility

desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
Deno
Node.js
multiline
Prototype accessor property (ES2015)

See also