Question 1

What goes in the routes folder vs the controllers folder?

Accepted Answer

Routes declare the endpoints and bind them to controllers. Controllers handle the request/response logic and call models. Routes are the map; controllers are the handlers.

Question 2

How should I structure a Node.js project folder?

Accepted Answer

Separate folders for config, routes, controllers, models, middlewares, and utils. Each file has one job. This is separation of concerns and keeps the codebase maintainable.

Question 3

Where do shared helpers go in a Node.js project?

Accepted Answer

In a utils folder. Things like the database connection, logger, email sender, and other helpers that multiple modules use live in utils.

Question 4

Should controllers contain business logic?

Accepted Answer

Keep controllers thin. Put complex logic in a services folder if needed. Controllers should parse the request, call the service, and send the response.

What goes in the routes folder vs the controllers folder?

More FAQs in How to Structure a Node.js Project Folder: A Practical Layout

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