JavaScript RegExp unicodeSets
Syntax & Examples

RegExp.unicodeSets property

The unicodeSets property of the RegExp object in JavaScript indicates whether the 'v' flag, which is an upgrade to the 'u' mode for handling Unicode sets, is enabled. This property is read-only.

Syntax of RegExp.unicodeSets

The syntax of RegExp.unicodeSets property is:

RegExp.prototype.unicodeSets

This unicodeSets property of RegExp whether or not the 'v' flag, an upgrade to the 'u' mode, is enabled. This property is read-only.

Return Type

RegExp.unicodeSets returns value of type Boolean.


✐ Examples

1 Checking if the unicodeSets property is enabled

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

For example,

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

JavaScript Program

const regex = /\p{Letter}/v;
const isUnicodeSetsEnabled = regex.unicodeSets;
console.log(isUnicodeSetsEnabled);

Output

true

2 Comparing unicodeSets property with different flags

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

For example,

  1. We create a RegExp object regexWithV with the 'v' flag /\p{Letter}/v.
  2. We create another RegExp object regexWithoutV without the 'v' flag /\p{Letter}/u.
  3. We check the unicodeSets property of both objects and log the results to the console.

JavaScript Program

const regexWithV = /\p{Letter}/v;
const regexWithoutV = /\p{Letter}/u;
console.log(regexWithV.unicodeSets); // true
console.log(regexWithoutV.unicodeSets); // false

Output

true
false

3 Using unicodeSets property in conditional statements

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

For example,

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

JavaScript Program

const regex = /\p{Letter}/v;
if (regex.unicodeSets) {
  console.log('Unicode sets are enabled.');
} else {
  console.log('Unicode sets are not enabled.');
}

Output

Unicode sets are enabled.

Summary

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