Node.js crypto.randomUUID( ) Function

The crypto.randomUUID() is an inbuilt application programming interface of class Crypto within crypto module which is used to generate a random RFC 4122 Version 4 UUID.

Syntax:

const crypto.randomUUID([options])

Parameters: This function takes the disableEntropyCache as a parameter

Return Value: This function returns a random RFC 4122 Version 4 UUID.

Example 1:

index.js

<script> 

  // Node.js program to demonstrate the   

  // crypto.randomUUID() api 

  // Importing crypto module 

  const crypto = require('crypto') 

  // getting a random RFC 4122 Version 4 UUID 

  // by using randomUUID() method 

  const val = crypto.randomUUID({disableEntropyCache : true}); 

  // display the result 

  console.log("RFC 4122 Version 4 UUID : " + val) 
</script>

Run the index.js file using the following command.

node index.js

Output:

RFC 4122 Version 4 UUID : 88368f2a-d5db-47d8-a05f-534fab0a0045

Example 2:

index.js

<script> 

  // Node.js program to demonstrate the   

  // crypto.randomUUID() api 

  // Importing crypto module 

  const crypto = require('crypto') 

  // getting a random RFC 4122 Version 4 UUID 

  // by using randomUUID() method 

  console.log(crypto.randomUUID()) 
</script>