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In React, a custom hook is a JavaScript function that allows you to reuse stateful logic across different components. Custom hooks provide a way to extract component logic into reusable functions, making your code more modular and easier to maintain. Here's how you can create and use a custom hook in React:

· Create a new JavaScript file for your custom hook. By convention, it's common to prefix the file name with "use" to indicate that it's a hook. For example, you could create a file called useCustomHook.js.

· In the 'useCustomHook.js' file, import the necessary React hooks if you need them. Common hooks include 'useState', 'useEffect', 'useContext', etc. You can also import any other dependencies or helper functions you might need.

· Define your custom hook function. It should start with the word "use" followed by a descriptive name. The function can take any parameters you need to configure the hook.

· Save the 'useCustomHook.js' file and import the custom hook into the component where you want to use it.

That's it! Your custom hook is now ready to be used within the ‘MyComponent’ component. You can reuse the ‘useCustomHook’ in other components as well by importing it and calling it again.

Remember that custom hooks allow you to encapsulate and reuse stateful logic, so you can leverage them to keep your components more focused and maintainable by separating concerns.

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