All a React custom hook is…

If you’re a React developer, you’ve probably heard of custom hooks. But what exactly are they and how can they benefit your projects?

What is a React custom hook?

A React custom hook is a JavaScript function that starts with the word “use” and can contain stateful logic that can be reused across different components. Custom hooks allow you to extract reusable logic from a component and share it between multiple components.

How to create a custom hook

To create a custom hook, you simply create a function that contains the logic you want to share. Here’s an example of a simple custom hook that manages the state of a form input:

    import { useState } from 'react';

    function useFormInput(initialValue) {
      const [value, setValue] = useState(initialValue);

      function handleChange(e) {
        setValue(e.target.value);
      }

      return {
        value,
        onChange: handleChange
      };
    }

    export default useFormInput;
  

Using a custom hook

Once you’ve created a custom hook, you can use it in your components just like any other hook provided by React:

    import React from 'react';
    import useFormInput from './useFormInput';

    function MyComponent() {
      const firstName = useFormInput('');
      const lastName = useFormInput('');

      return (
        

          
          
        
      );
    }

    export default MyComponent;
  

Benefits of custom hooks

Custom hooks allow you to write more reusable and maintainable code by separating the logic from the UI components. They encourage a more functional programming style and can help reduce code duplication in your application.

Conclusion

React custom hooks are a powerful feature that can help you write cleaner and more maintainable code. By extracting logic into custom hooks, you can easily reuse it across different components and improve the overall organization of your codebase.