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Node.js Design Patterns

You're reading from   Node.js Design Patterns Level up your Node.js skills and design production-grade applications using proven techniques

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Product type Paperback
Published in Sep 2025
Publisher Packt
ISBN-13 9781803238944
Length 732 pages
Edition 4th Edition
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Authors (2):
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Luciano Mammino Luciano Mammino
Author Profile Icon Luciano Mammino
Luciano Mammino
Mario Casciaro Mario Casciaro
Author Profile Icon Mario Casciaro
Mario Casciaro
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Table of Contents (16) Chapters Close

Preface 1. The Node.js Platform 2. The Module System FREE CHAPTER 3. Callbacks and Events 4. Asynchronous Control Flow Patterns with Callbacks 5. Asynchronous Control Flow Patterns with Promises and Async/Await 6. Coding with Streams 7. Creational Design Patterns 8. Structural Design Patterns 9. Behavioral Design Patterns 10. Testing: Patterns and Best Practices 11. Advanced Recipes 12. Scalability and Architectural Patterns 13. Messaging and Integration Patterns 14. Other Books You May Enjoy
15. Index

ES modules

ES modules were introduced as part of the ES2015 specification with the goal of giving JavaScript an official module system suitable for different execution environments. The ES modules specification tries to retain some good ideas from previous existing module systems like CommonJS and AMD. The syntax is very simple and compact. There is support for cyclic dependencies and the possibility to load modules asynchronously.

A cyclic dependency in a module system occurs when two or more modules depend on each other in a circular manner. For example, Module A imports from Module B, and Module B, in turn, imports from Module A. This creates a loop in dependencies that can lead to issues like incomplete module loading, runtime errors, or unexpected behavior, as the modules are unable to fully resolve due to their mutual reliance.

Using ES modules in Node.js

As previously discussed, when ES modules were introduced in Node.js, CommonJS had already long been...

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Node.js Design Patterns
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