How to use event-driven programming in Node.js

The text discusses two software architecture approaches: layered architecture and event-driven programming, emphasizing their applications and benefits in software development. Layered architecture, popular for its simplicity and efficiency in small to medium-sized projects, is often structured with patterns like MVC, but may become cumbersome with excessive layers. Alternatively, event-driven programming is highlighted for its suitability in front-end development and highly asynchronous systems, allowing for unidirectional data flow and easy feature addition without modifying existing components. The text further explores the implementation of an event-driven system using Nestjs and CQRS design patterns, demonstrating how events and commands are used to build a responsive bidding system. This approach allows for the chaining of commands and events, facilitating aspect-oriented programming to enhance functionality without altering existing code. The text concludes by noting the potential of event-driven programming to significantly improve application architecture when applied appropriately.