What Is a Hook?
Understand what a React Hook is, how it functions as a special type of function, and why its calling order matters. Learn how hooks manage state independently by maintaining their order during runtime, enabling efficient functional component state management.
We'll cover the following...
Custom React hook function
Now that we have revealed the stripped-down version of the React Hook infrastructure and crafted a function using it, let's give it a spin in a function component:
const Title = () => {const a = _useHook(0)}
The a variable is assigned a 0 number upon the mount, and then it serves as a state for the rest of the updates.
_useHook is technically a React hook function. Though it's not officially supported, and we crafted it here to demonstrate the infrastructure, it has everything required to be a hook function. Let's take a close look at it.
To distinguish the educational hook that we crafted from the officially supported hook, we prefixed the hook name with _ as in _useHook.
We’ll further explain the nature of a hook being a function as well as its ...