Web/JavaScript/Reference/Global objects/RegExp/unicode

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

Property attributes of `RegExp.prototype.unicode`
Writable	no
Enumerable	no
Configurable	yes

Description

The value of unicode is a Boolean and true if the "u" flag was used; otherwise false. The "u" flag enables various Unicode-related features. With the "u" flag, any Unicode code point escapes will be interpreted as such, for example.

You cannot change this property directly. It is read-only.

Examples

Using the unicode property

var regex = new RegExp('\u{61}', 'u');

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

Specifications

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

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
`unicode`	Chrome Full support 50	Edge Full support 12 Notes' Full support 12 Notes' Notes' Case folding is implemented in version 13	Firefox Full support 46	IE No support No	Opera Full support 37	Safari Full support 10	WebView Android Full support 50	Chrome Android Full support 50	Firefox Android Full support 46	Opera Android Full support 37	Safari iOS Full support 10	Samsung Internet Android Full support 5.0	nodejs Full support 6.0.0 Notes' Full support 6.0.0 Notes' Notes' Case folding is implemented in version 8.6.0

Legend

Full support: Full support
No support: No support
See implementation notes.': See implementation notes.