React Auth Snippets
12 copy-paste React snippets covering every common authentication pattern — JWT login, OAuth, session management, protected routes, and token refresh. TypeScript, no magic, no hidden dependencies.
12 copy-paste React snippets covering every common authentication pattern — JWT login, OAuth, session management, protected routes, and token refresh. TypeScript, no magic, no hidden dependencies.
What is React Auth Snippets?
Authentication in React has a hundred ways to go wrong. JWT stored in localStorage is vulnerable to XSS. Tokens not refreshed lead to surprise logouts. Protected routes with client-side checks only are trivially bypassed. OAuth flows botched at the redirect step lose users. These 12 snippets are the distilled output of building auth in 200+ React projects — each one handles a specific auth pattern correctly, with the security considerations and edge cases already accounted for. They're not a framework or an abstraction layer. They're clean, readable TypeScript functions and React components you copy into your project, read through, and own completely. No black boxes, no dependency hell, no reading someone else's auth library docs.
Everything in the package.
JWT Login Flow
POST to auth endpoint, store token in httpOnly cookie (not localStorage), handle 401 responses globally with an Axios interceptor.
OAuth with PKCE
Google and GitHub OAuth using the PKCE flow — secure for SPAs, no client secret required. Handles the redirect, code exchange, and token storage.
useAuth Hook
A React context + hook that exposes the current user, login, logout, and isAuthenticated — consumed by any component in the tree.
Protected Route Component
React Router v6 component that redirects unauthenticated users to /login and preserves the intended destination for post-login redirect.
Token Refresh Interceptor
Axios interceptor that automatically refreshes an expired access token using the refresh token, then retries the original request.
Session Timeout Handler
Detects user inactivity and shows a countdown warning before logging them out — standard in healthcare and finance applications.
Remember Me Persistence
Correctly implements 'remember me' — long-lived tokens in a persistent cookie vs short-lived tokens in session storage.
Role-Based Route Guards
Extended protected route that checks user roles or permissions before granting access. Works with any role model — string arrays or permission bitmasks.
Built for production, not demos.
HttpOnly Cookie Storage
Tokens are stored in httpOnly cookies by default — not localStorage. This closes the XSS token theft attack vector that most JWT tutorials ignore.
CSRF Protection
The JWT snippets include CSRF token generation and validation to protect cookie-based auth from cross-site request forgery attacks.
TypeScript Throughout
Every snippet is fully typed — User type, AuthContext type, protected route props. Slot them into a strict TypeScript project without modification.
React Router v6 Compatible
All routing components are written for React Router v6 with the Data Router pattern. Includes v5 compatibility notes in comments.
No Vendor Lock-In
These are plain React and TypeScript — no auth library required. Drop them into any project regardless of your backend or auth service.
Security Notes Inline
Each snippet includes inline comments explaining the security decision behind implementation choices — so you understand what you're shipping.
Who is this for?
Developers, indie hackers, and product teams who want to skip the boilerplate and ship faster.
Developers Building Auth Without a Library
Sometimes you don't want NextAuth, Clerk, or Auth0. You want to own the auth layer completely. These snippets give you the building blocks without the magic.
Junior Developers Learning Secure Auth
Each snippet is documented with why, not just how. The inline security notes make these an education resource as much as a code library.
Teams Auditing Existing Auth Code
Use these as reference implementations. Compare your current JWT handling against the correct implementation and identify where your code diverges.
Rapid Prototyping
Get secure auth working in a prototype in an hour instead of a day. Upgrade, extend, or replace individual snippets as the project matures.
Technologies used.
Core
Auth
HTTP
Security
Common questions.
Does this work with Next.js?
Most snippets work in Next.js. The protected route component uses React Router, which doesn't apply to Next.js — but the useAuth hook, JWT handling, and token refresh interceptor all work fine. The README has Next.js-specific middleware notes.
What backend does this assume?
No specific backend — the login snippet POSTs to a configurable endpoint URL. The token structure follows standard JWT conventions, so it works with any backend that issues JWTs.
Does it include registration / signup?
No — these snippets focus on the client-side auth flow after a user exists. Registration UI is outside scope, but the README shows how to extend the useAuth hook to include a register function.
Are these production-ready or just examples?
They're production-ready patterns. HttpOnly cookies, PKCE, CSRF protection, and token refresh are all real security implementations — not tutorial shortcuts.
What about social login providers other than Google and GitHub?
The OAuth PKCE snippet is provider-agnostic — swap the authorization and token endpoint URLs for any OAuth 2.0 provider. Twitter, LinkedIn, Discord, and Spotify all work the same way.
Need something custom-built?
This template is a great starting point, but every product is different. If you need React Auth Snippets customised to your stack, extended with extra features, or built from scratch around your exact requirements — our engineers can do that. Tell us what you need and we'll scope it for free.
Ready to ship faster?
Buy React Auth Snippets today and go from zero to production in hours — not weeks.
Setup and implementation
Review prerequisites, installation steps, and configuration before integrating this product.
Read the setup documentation