In this chapter, we have explored the purpose and application of design patterns in JavaScript. This has spanned a foundational introspection on what it even means for something to be a design pattern and an exploration of some common modular and architectural design patterns. We have explored the various ways we can declare abstractions using JavaScript's native mechanisms such as classes and prototypes, and some more novel mechanisms such as the Revealing Module pattern. Our deep coverage of these patterns will ensure that, in the future, we have ample options available to us when crafting our abstractions.

In the next chapter, we will be exploring real-world challenges encountered by JavaScript programmers, such as state management and network communication, and applying our knowledge of new perspectives to them.