Node.js FAQ: Top Questions

Dependency injection (DI) in Node.js is a design pattern where dependencies are passed into a module rather than being created inside, improving testability and modularity.

• Benefits: Easier mocking, loose coupling, better maintainability.
• Tools: Manual DI, libraries like awilix or inversifyJS .
• Approach: Pass dependencies via constructor or function arguments.
• Use Case: Large-scale applications, testing.