How to create a custom hook for handling user interactions with the browser's screen size in Next.js



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To create a custom hook for handling user interactions with the browser's screen size in a Next.js application, you can follow these steps:

  1. Create a new file for your custom hook. You can name it something like useWindowSize.js.

  2. Inside this file, import the necessary hooks and functions from React:

javascript
import { useState, useEffect } from 'react';
  1. Define your custom hook function, useWindowSize. Inside this function, you'll use the useState and useEffect hooks to track changes to the window size:
javascript
function useWindowSize() {
  const [windowSize, setWindowSize] = useState({
    width: typeof window !== 'undefined' ? window.innerWidth : 0,
    height: typeof window !== 'undefined' ? window.innerHeight : 0,
  });

  useEffect(() => {
    const handleResize = () => {
      setWindowSize({
        width: window.innerWidth,
        height: window.innerHeight,
      });
    };

    window.addEventListener('resize', handleResize);

    // Cleanup function to remove the event listener when the component unmounts
    return () => window.removeEventListener('resize', handleResize);
  }, []); // Empty dependency array ensures that this effect only runs once

  return windowSize;
}
  1. Export the useWindowSize hook:
javascript
export default useWindowSize;
  1. Now you can use this custom hook in your Next.js components. For example:
javascript
import React from 'react';
import useWindowSize from '../hooks/useWindowSize';

function MyComponent() {
  const windowSize = useWindowSize();

  return (
    <div>
      <h1>Window Size:</h1>
      <p>Width: {windowSize.width}px</p>
      <p>Height: {windowSize.height}px</p>
    </div>
  );
}

export default MyComponent;

This custom hook will provide you with the current width and height of the browser window and automatically update them whenever the window is resized. You can use this information to handle responsive behavior or layout adjustments in your Next.js components.

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