UUID in JavaScript — Tutorial Video Walkthrough

What This Video Covers

JavaScript UUID tutorial videos cover the full workflow: choosing between the built-in Web Crypto API and the uuid npm package, using UUIDs correctly in React and Next.js, typing them in TypeScript, and wiring v7 into Prisma and Drizzle.

Skill level: Beginner to intermediate Best for: Frontend and full-stack developers working with React, Next.js, or Node.js

Key Concepts You Will Learn

1. crypto.randomUUID() — the built-in option

// Works in browser, Node.js 14.17+, Deno, Bun
const id = crypto.randomUUID();
// → "550e8400-e29b-41d4-a716-446655440000"

No install required. Cryptographically secure. Always produces UUID v4. See the full browser and runtime support matrix.

2. The uuid npm package for v7

import { v7 as uuidv7 } from 'uuid';
const id = uuidv7();
// → "018fbe3a-4c5d-7b12-8abc-0123456789ab"

The uuid package adds UUID v7 with a per-process monotonic counter — within-millisecond ordering that crypto.randomUUID() cannot provide. Install: npm install uuid.

3. React hydration — the common mistake

// ❌ Wrong — different UUID on server vs client → hydration mismatch
function Card() {
  return <div id={crypto.randomUUID()}>...</div>;
}

// ✅ Correct — stable after first render
function Card() {
  const id = useId(); // React's built-in for DOM relationships
  return <div id={id}>...</div>;
}

For record IDs (not DOM IDs), generate in Server Actions or event handlers. See UUID in React and Next.js.

4. TypeScript branded types

type UserId  = string & { readonly _brand: 'UserId' };
type OrderId = string & { readonly _brand: 'OrderId' };

const userId  = crypto.randomUUID() as UserId;
const orderId = uuidv7()            as OrderId;

// ❌ Compile error: cannot pass UserId where OrderId is expected
processOrder(userId);

Branded types catch ID mix-ups at compile time with zero runtime cost. See TypeScript UUID Types.

5. Prisma and Drizzle UUID v7

// Prisma schema
model Order {
  id String @id @default(dbgenerated("uuidv7()")) @db.Uuid
}

// Drizzle
const orders = pgTable('orders', {
  id: uuid('id').primaryKey().defaultRandom(), // or .$defaultFn(() => uuidv7())
});

See UUID v7 ORM Support in 2026 for Prisma, Drizzle, GORM, and SQLAlchemy.

Related Reading

• UUID in JavaScript — full guide
• crypto.randomUUID() browser and runtime support
• UUID in React and Next.js
• TypeScript UUID branded types
• UUID v7 ORM support — Prisma, Drizzle, GORM
• UUID in GraphQL — ID scalar and custom types

Watch on YouTube

Search for JavaScript UUID tutorial videos on YouTube ↗

Generate and Decode

• Generate a UUID v7 or v4 in the browser — no install
• UUID Decoder — see the version, variant, and v7 timestamp
• UUID Validator — check any UUID string from a video example