nodejs-best-practices

Separating business logic from controllers in Node.js backend services involves keeping controllers lightweight and delegating processing to dedicated service modules. This modular architecture enforces separation of concerns, improving code maintainability and testability.

Error handling in async/await Node.js functions requires consistent try/catch blocks or higher-order wrapper functions. This discipline ensures asynchronous operations are caught gracefully, preventing unhandled promise rejections and improving application reliability.

Dependency injection in Node.js microservices involves passing dependencies explicitly rather than importing them directly. This pattern isolates modules during testing, allowing mock substitutions and ensuring scalable, testable project structures.

Node.js applications suffer performance bottlenecks and sprawling architecture due to inconsistent patterns and tightly coupled code. Implementing modular architectures and async/await discipline resolves these maintainability and performance challenges.

Auditing an existing Node.js codebase with this approach works by evaluating current patterns against recommended modular structures. It identifies separation of concerns violations and error handling gaps to improve reliability and performance.

Observable logging in a Node.js project is needed when building backend services or microservices that require clear interfaces. It provides necessary runtime visibility for tracking asynchronous operations and diagnosing errors.