Clean code in NestJS

#nestjs #programming #cleancode #backenddevelopment

In the day-to-day life of a developer, writing code that works is not enough.
Over time, I understood that the real challenge is to keep that code understandable, scalable and clean.
In this article I share principles, examples and learnings that have served me well working with NestJS on real projects.

🟩 Development (3 key sections)

1️⃣ Clean Code principles that I apply in NestJS

Avoid unnecessary comments: the code explains itself.
Divide responsibilities: each class does only one thing.
Descriptive names for classes, functions and variables.

2️⃣ Modular and reusable architecture

Use modules to separate domains.
Inject dependencies instead of coupling them.
Avoid business logic in controllers.

3️⃣ Testing: why it saved me more than once

Using unit testing and e2e.
How it helped me to detect bugs before deployment.
Tools I use: Jest, Supertest, Stryker (mutation).

🟨 Conclusion

Writing clean code is not something that is achieved with a single practice, but with consistency.
NestJS has helped me structure my projects better, but more importantly, applying good practices has made my projects scale without becoming a nightmare.