How to generate Unique ID in Node.js? Generate UUID in Node.js

Node.js / January 19, 2021 / TopCode / 1

Introduction:

A universally unique identifier (UUID) is a 128-bit label used for information in computer systems. If you are a developer and you want to make any entity unique in your application then UUID is the best choice.

Generating a UUID in Node.js is very simple. With help of a third-party library, it is possible. UUID is created by Cryptographically-strong random values that’s why it is very secure.

In this article, I will explain how to generate UUID in Nodejs.

First, we need to install uuid by running following command.

npm install uuid

There different ways to generate the UUID based on version.

const uuid = require('uuid');
console.log("version 1  UUID", uuid.v1())
console.log("version 4 UUID", uuid.v4())

uuid.NIL	 The nil UUID string (all zeros)	
uuid.parse()	 Convert UUID string to array of bytes	
uuid.stringify() Convert array of bytes to UUID string
uuid.v1()	 Create a version 1 (timestamp) UUID	
uuid.v3()	 Create a version 3 (namespace w/ MD5) UUID	
uuid.v4()	 Create a version 4 (random) UUID	
uuid.v5()	 Create a version 5 (namespace w/ SHA-1) UUID	
uuid.validate()	 Test a string to see if it is a valid UUID	
uuid.version()	 Detect RFC version of a UUID	

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