Web Reference: Reusing Logic with Custom Hooks React comes with several built-in Hooks like useState, useContext, and useEffect. Sometimes, you’ll wish that there was a Hook for some more specific purpose: for example, to fetch data, to keep track of whether the user is online, or to connect to a chat room. Aug 19, 2025 · A custom hook is a JavaScript function that starts with use and internally calls other hooks like useState, useEffect, or useContext. It allows developers to extract reusable logic, keeping components clean and modular. This is where Custom Hooks in React become extremely powerful. Custom Hooks allow you to extract and reuse logic across multiple components, making your code cleaner and easier to scale. In this article, you will learn what custom hooks are, why they are important, and how to create one step-by-step using a real-world example.
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