In this chapter, we first learned how to extract custom Hooks from existing code in our blog app. We extracted various Context Hooks into custom Hooks, then created API Hooks and a more advanced Hook for debounced undo functionality. Next, we learned about interactions between Hooks and how we can use values from other Hooks in custom Hooks. We then created local Hooks for our blog app. Then, we learned about testing various Hooks with Jest and the React Hooks Testing Library. Finally, we learned about all the Hooks provided by the React Hooks API, at the time of writing.
Knowing when and how to extract custom Hooks is a very important skill in React development. In a larger project, we are probably going to define many custom Hooks, specifically tailored to our project's needs. Custom Hooks can also make it easier to maintain our application, as we only need to adjust...
