React HooksLesson 46Free preview

What is Hooks?

This lesson is part of React · All levels

Summary

Hooks are built-in React functions that allow functional components to use state and life cycle without writing class. useState, useEffect, and useContext are the most common examples. There is a mandatory rule: Hooks can only be called at the top of a functional component, not under conditions or repetitions.

Key points

Hooks are used in functional components, not class.
Call Hook only at the highest level of the component function
The name Hook always begins with the word use.
UseState for state, useEffect for side effects

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