JavaScript RegExp unicode
Syntax & Examples

RegExp.unicode property

The unicode property of the RegExp object in JavaScript indicates whether the 'u' flag, which enables Unicode features, is set. This property is read-only.

Syntax of RegExp.unicode

The syntax of RegExp.unicode property is:

RegExp.prototype.unicode

This unicode property of RegExp whether or not Unicode features are enabled. This property is read-only.

Return Type

RegExp.unicode returns value of type Boolean.


✐ Examples

1 Checking if the unicode property is enabled

In JavaScript, we can check if the 'u' flag is enabled for a RegExp object by accessing the unicode property.

For example,

  1. We create a RegExp object regex with the 'u' flag /\u{61}/u.
  2. We check the unicode property of regex to see if it is true.
  3. We log the result to the console.

JavaScript Program

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

Output

true

2 Comparing unicode property with and without the 'u' flag

In JavaScript, we can compare the unicode property of RegExp objects with and without the 'u' flag.

For example,

  1. We create a RegExp object regexWithU with the 'u' flag /\u{61}/u.
  2. We create another RegExp object regexWithoutU without the 'u' flag /a/.
  3. We check the unicode property of both objects and log the results to the console.

JavaScript Program

const regexWithU = /\u{61}/u;
const regexWithoutU = /a/;
console.log(regexWithU.unicode); // true
console.log(regexWithoutU.unicode); // false

Output

true
false

3 Using unicode property in conditional statements

In JavaScript, we can use the unicode property in conditional statements to perform different actions based on whether the 'u' flag is enabled.

For example,

  1. We create a RegExp object regex with the 'u' flag /\u{61}/u.
  2. We check the unicode property of regex in an if statement.
  3. If the property is true, we log 'Unicode features are enabled.' to the console; otherwise, we log 'Unicode features are not enabled.'.

JavaScript Program

const regex = /\u{61}/u;
if (regex.unicode) {
  console.log('Unicode features are enabled.');
} else {
  console.log('Unicode features are not enabled.');
}

Output

Unicode features are enabled.

Summary

In this JavaScript tutorial, we learned about unicode property of RegExp: the syntax and few working examples with output and detailed explanation for each example.