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Phase 8 · Authentication Across the Stack

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Sessions vs Tokens

Part of the Full Stack Developer Roadmap.

Summary

The two dominant approaches to remembering a logged-in user — server-side sessions (stateful, stored in a DB/Redis) vs tokens like JWT (stateless, verified without a lookup) — each with different trade-offs for a full-stack app.

How to Learn This

  • 1Implement a simple session-based login, then a token-based one, and compare the code.
  • 2Learn why token-based auth is often preferred for APIs consumed by separate frontend apps.
  • 3Understand sessions need shared storage (Redis) once you run multiple backend instances.

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TypeScript with Node/Express

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JWT

More topics in Authentication Across the Stack

JWTOAuth 2.0 & Social LoginPassword HashingProtected Routes (Frontend)Protected Routes (Backend)Role-Based Access ControlRefresh Tokens
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