Book Image

Designing React Hooks the Right Way

By : Fang Jin
Book Image

Designing React Hooks the Right Way

By: Fang Jin

Overview of this book

React hook creates a unique solution for using states in function components to orchestrate UI communication. They provide you with an easy interface to write custom data management solutions with low development and maintenance costs. Understanding how Hooks are designed enables you to use them more effectively, and this book helps you to do just that. This book starts with a custom-crafted solution to reveal why Hooks are needed in the first place. You will learn about the React engine and discover how each built-in Hook can manage a persistent value by hooking into it. You will walk through the design and implementation of each hook with code so that you gain a solid understanding. Finally, you'll get to grips with each Hook's pitfalls and find out how to effectively overcome them. By the end of this React book, you'll have gained the confidence to build and write Hooks for developing functional and efficient web applications at scale.
Table of Contents (12 chapters)

Questions and answers

Here are some questions and answers to refresh your knowledge:

  1. What is a state?

    For a function component, a state is a value created to be persistent during the life of the component. From each update, including the mount, this value can be accessed from inside a function.

  2. What are the usages of states?

    If a task can't be done within one update, that is the time we can think of using a state to reference a memory that can be accessed in multiple updates. We normally use a state to request a new update, listen to a value change, as well as perform a task at the mount. But the states can be very versatile.

  3. What does a state do to the UI?

    To determine the screen corresponding to a component, we need to know its states as well as its props. While the props are passively defined on the component interface, the states are defined inside the component to actively refine its behavior. Apps built with states can change with time, driven by either user interactions or any other external processes.