Passport.js (Express Authentication)

Overview

Passport.js is the de-facto standard authentication middleware for Express.js. It uses a strategy pattern with 500+ available strategies for different auth mechanisms.

Version: passport@0.7.x, passport-jwt@4.x
Use case: Express.js applications, custom auth flows, pure APIs

Key Benefit: Maximum flexibility, works with any Express app, battle-tested in production.

When to Use This Skill