Express.js

What should developers avoid with Express.js in early-stage projects?

The question is about Express.js .

Answer:
Early Express.js projects should implement TypeScript, as untyped Express codebases become hard to maintain with increasing route and middleware complexity. Avoid placing business logic directly in route handlers without a service layer, because this results in tightly coupled, untestable code. Do not use Express without an input validation library such as Zod or Joi, since unvalidated request bodies are a major source of security vulnerabilities in Express applications.

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