backend-passport-js

JWT authentication in Express.js uses Passport.js middleware to issue stateless tokens on login and validate them on protected routes. Configure a JWT strategy, create login/registration endpoints, and apply middleware to secure your API endpoints.

Yes, Passport.js supports 500+ authentication strategies including OAuth providers like Google and GitHub. Each strategy follows a consistent pattern, letting you add social login to Express APIs with minimal configuration.

Role-based authorization in Express combines Passport.js middleware with custom role-checking logic on protected routes. After authenticating a user, verify their role and grant or deny access before executing route handlers.

Token refresh strategies issue short-lived access tokens and longer-lived refresh tokens. On expiration, clients exchange the refresh token for a new access token, minimizing exposure while maintaining user sessions without database lookups.

Yes, Passport.js JWT authentication is stateless and scales across microservices. Each service validates tokens independently using the same secret, eliminating the need for centralized session storage and enabling service-to-service communication.

Passport.js provides custom strategy support for local username/password, API keys, bearer tokens, and proprietary schemes. Mix strategies in a single app to support legacy clients, third-party integrations, and internal service auth simultaneously.