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    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.

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


    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.


    Example: Using multiline

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


    Specification Status Comment
    ECMAScript 3rd Edition. Standard Initial definition. Implemented in JavaScript 1.2.
    JavaScript 1.5: multiline is a property of a RegExp instance, not the RegExp object.
    ECMAScript 5.1 (ECMA-262)
    The definition of 'RegExp.prototype.multiline' in that specification.
    ECMAScript 2015 (6th Edition, ECMA-262)
    The definition of 'RegExp.prototype.multiline' in that specification.
    Standard multiline is now a prototype accessor property rather than an instance's own data property.

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
    Prototype accessor property ? 38 (38) ? ? ?
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)
    Prototype accessor property ? ? 38.0 (38) ? ? ?

    See also

    Document Tags and Contributors

    Contributors to this page: Sheppy, fscholz, Mgjbot, Maian, Dria, Prodoc, Rychly, Janderson, Mingun
    Last updated by: fscholz,