RegExp.prototype.multiline - JavaScript 编辑

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.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

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

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

Specification
ECMAScript (ECMA-262) The definition of 'RegExp.prototype.multiline' in that specification.

Browser compatibility

BCD tables only load in the browser

See also

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