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Learn React Hooks for Frontend Development

Understanding the useContext Design

Explore how the useContext hook accesses and manages React context values within functional components. Understand its linked list dependency design, how it tracks multiple contexts, and its role in efficiently updating components during state changes.

We'll cover the following...

Overview of the useContext hook

The useContext hook in React is used to access the value of a React context directly within a functional component.

React provides a useContext hook to consume a context:

import UserContext from './UserContext';
const Title = () => {
  // Accessing user context using useContext hook
  const user = useContext(UserContext);
  // Displaying the user's name
  return <div>{user.name}</div>;
}
React component displaying the user's name using context

The useContext hook function takes one input argument, context, and returns the shared value. context is normally imported from a definition file.

The useContext hook's data structure

We'll explain how useContext is designed with a stripped-down ...