RegExp.prototype.multiline

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

Description

The value of multiline is a Boolean and is 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.

You cannot change this property directly.

Examples

Using multiline

var regex = new RegExp('foo', 'm');
console.log(regex.multiline); // true

Specifications

Browser compatibility

Compatibility notes

• Prior to SpiderMonkey 48 (Firefox 48 / Thunderbird 48 / SeaMonkey 2.45), a non-standard, global RegExp.multiline property existed in addition to this RegExp.prototype.multiline property. It is removed in newer versions (see bug 1219757). Use the property described on this page or the m flag instead.

See also

• RegExp.lastIndex
• RegExp.prototype.global
• RegExp.prototype.ignoreCase
• RegExp.prototype.source
• RegExp.prototype.sticky