JavaScript RegExp multiline Property

The multiline property indicates whether to treat the ' m flag (modifier)' is used with the regular expression.

If the ' m If the 'flag (modifier)' is specified, this property returns true; otherwise, it returns false.

Syntax:

regex.multiline

Example

var str = "Hello world";
var regex =　/^Hello/m;
regex.multiline;//　true

All browsers fully support the multiline property:

Properties
multiline	Yes	Yes	Yes	Yes	Yes

Writable:	No
Enumerable:	No
Configurable:	Yes
Return Value:	If the 'm' modifier is set, it returns true; otherwise, it returns false.
JavaScript Version:	ECMAScript 1