How to Generate Unique IDs in JavaScript

1. Using the Current Time

Generate a unique ID based on the current time. Keep in mind, this might not be completely unique if you generate many IDs quickly.

const uniqueId = Date.now().toString();
console.log(uniqueId);

2. Using a Random Number

This method creates an ID using a random number. Simple, but not perfect for every use case.

const uniqueId = Math.random().toString(36).substring(2, 15);
console.log(uniqueId);

3. Using crypto.randomUUID()

In newer browsers and Node.js, you can use this built-in function for a truly unique ID.

const uniqueId = crypto.randomUUID();
console.log(uniqueId);

4. Using a Library

For an easy and reliable method, use a library like uuid.

Install the library for your project:

npm install uuid

Generate a UUID:

import { v4 as uuidv4 } from 'uuid';
const uniqueId = uuidv4();
console.log(uniqueId);

These are various ways to generate unique IDs in JavaScript, ranging from simple to more sophisticated methods.