What should I learn before Express for REST APIs?
HTTP. Methods (GET, POST, PUT, PATCH, DELETE), status codes, headers, the request-response cycle. Without HTTP, REST design will not make sense.
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More FAQs in REST API Roadmap for Node.js Developers
Learn HTTP, learn Express, learn REST principles, design an API before coding, add MongoDB with Mongoose, add input validation, add JWT auth, add error handling, add security middlewares, add pagination and filtering, add logging, test, document, and deploy.
After databases and CRUD. Auth depends on user schemas, password hashing, and tokens. It is a natural next step after you can store and retrieve users.
Use Jest and supertest. Import the Express app, send requests with supertest, assert on the response. Test happy paths and error paths. Run tests in CI.
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