Create React Custom Hooks In 2023

React custom hooks are a powerful tool that allows developers to extract reusable logic from components, promoting cleaner and more maintainable code. In this article, we’ll take a user-friendly approach to understanding custom hooks in React, breaking down the concepts and providing a practical example to illustrate their usage.

Understanding Custom Hooks:

Custom hooks are JavaScript functions that encapsulate specific behavior, making it easy to reuse that behavior across multiple components. They are named with the prefix “use” (e.g., useCustomHook) to indicate that they follow the rules of hooks and can access other hooks if needed.

Custom hooks offer a way to share logic that doesn’t require the complexity of state management solutions like Redux or Mobx. They are especially useful for managing side effects, handling API calls, managing local storage, and more.

Creating a Simple Custom Hook: Example

Let’s create a simple custom hook that handles dark mode toggling for a React application.

1. Create the Custom Hook:

// useDarkMode.js

import { useState } from 'react';

function useDarkMode(initialValue = false) {
  const [isDarkMode, setIsDarkMode] = useState(initialValue);

  const toggleDarkMode = () => {
    setIsDarkMode(!isDarkMode);
  };

  return { isDarkMode, toggleDarkMode };
}

export default useDarkMode;

1. Using the Custom Hook:

// App.js

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

function App() {
  const { isDarkMode, toggleDarkMode } = useDarkMode(false);

  const themeStyles = {
    backgroundColor: isDarkMode ? '#333' : '#fff',
    color: isDarkMode ? '#fff' : '#333',
  };

  return (
    <div style={themeStyles}>
      <h1>React Dark Mode Example</h1>
      <button onClick={toggleDarkMode}>
        {isDarkMode ? 'Light Mode' : 'Dark Mode'}
      </button>
    </div>
  );
}

export default App;

In this example, the custom hook useDarkMode encapsulates the logic for toggling between dark and light modes. It returns the current mode (isDarkMode) and a function to toggle the mode (toggleDarkMode). The main component (App) uses the hook to manage the theme's state and appearance.

Benefits of Custom Hooks:

1. Code Reusability: Custom hooks allow you to encapsulate and reuse complex logic across different components.
2. Separation of Concerns: Custom hooks promote separation of concerns by keeping logic separate from the component’s rendering.
3. Readability and Maintainability: By extracting logic into custom hooks, components become more readable and maintainable.
4. Hook Composability: You can compose custom hooks with other hooks to create more complex behavior.

React custom hooks are a valuable tool that simplifies the sharing of logic between components, leading to cleaner, more organized, and reusable code. By understanding the basics of custom hooks and utilizing them in your projects, you can enhance your development workflow and create more efficient and maintainable React applications. Remember, the key to mastering custom hooks lies in recognizing patterns that can be abstracted into reusable hooks, ultimately boosting your productivity and code quality.#make react hook, #reacthook