milarly, a regex is _Unicode-unaware_ if it has neither the ` u ` nor the `
v ` flag. In this case, the regex is interpreted as a sequence of UTF-16 code
units, and there are many legacy syntaxes that do not become syntax errors.

##  Examples

###  Using the unicode property

js

    
    
    const regex = /\u{61}/u;
    
    console.log(regex.unicode); // true
    

##  Specifications

Specification  
---  
[ ECMAScript Language Specification  
#  sec-get-regexp.prototype.unicode  ](https://tc39.es/ecma262/multipage/text-
processing.html#sec-get-regexp.prototype.unicode)  
  
##  Browser compatibility

BCD tables only load in the browser  with JavaScript enabled. Enable
JavaScript to view data.

##  See also

  * [ ` RegExp.prototype.lastIndex ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/lastIndex)
  * [ ` RegExp.prototype.dotAll ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/dotAll)
  * [ ` RegExp.prototype.global ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/global)
  * [ ` RegExp.prototype.hasIndices ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/hasIndices)
  * [ ` RegExp.prototype.ignoreCase ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/ignoreCase)
  * [ ` RegExp.prototype.multiline ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/multiline)
  * [ ` RegExp.prototype.source ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/source)
  * [ ` RegExp.prototype.sticky ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/sticky)

##  Help improve MDN

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