Why use Swagger for API docs?
Clients can try the API in the browser without writing code. You can generate client SDKs in many languages from the spec. The spec is a contract between backend and frontend that lives with the code. Onboarding new devs is faster with interactive docs.
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More FAQs in API Documentation With Swagger in Node.js
Use Swagger (OpenAPI). Install swagger-ui-express and swagger-jsdoc. Write specs in JSDoc comments next to your routes. Mount Swagger UI at /docs for interactive documentation. Keep docs in sync by writing them next to the code.
Use swagger-jsdoc so the spec lives in JSDoc comments next to the routes. When you change a route, you see the doc comment and update it. Outdated docs are worse than no docs; co-locating docs and code helps them stay in sync.
Postman collections (good for sharing with testers), markdown docs (simple but no interactivity), and Stoplight or Redoc (alternative renderers for OpenAPI). Swagger is the most common because it has interactive UI and SDK generation.
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