How to implement a custom hook for handling route animations in Next.js



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To implement a custom hook for handling route animations in Next.js, you can use the useRouter hook from Next.js to get access to the router object and listen for route changes. Additionally, you may want to use a state management library like React's useState to manage the animation state. Here's a basic example:

  1. Create a new file for your custom hook, for example, useRouteAnimations.js:
jsx
// useRouteAnimations.js
import { useEffect, useState } from 'react';
import { useRouter } from 'next/router';

const useRouteAnimations = () => {
  const router = useRouter();
  const [isAnimating, setIsAnimating] = useState(false);

  useEffect(() => {
    const handleStart = () => {
      setIsAnimating(true);
    };

    const handleComplete = () => {
      setIsAnimating(false);
    };

    router.events.on('routeChangeStart', handleStart);
    router.events.on('routeChangeComplete', handleComplete);
    router.events.on('routeChangeError', handleComplete);

    return () => {
      router.events.off('routeChangeStart', handleStart);
      router.events.off('routeChangeComplete', handleComplete);
      router.events.off('routeChangeError', handleComplete);
    };
  }, [router]);

  return { isAnimating };
};

export default useRouteAnimations;
  1. Now, you can use this custom hook in your pages to conditionally apply animations. For example:
jsx
// pages/_app.js
import { useEffect } from 'react';
import { AnimatePresence } from 'framer-motion';
import { useRouter } from 'next/router';
import useRouteAnimations from '../path/to/useRouteAnimations';

function MyApp({ Component, pageProps }) {
  const router = useRouter();
  const { isAnimating } = useRouteAnimations();

  useEffect(() => {
    // Your global setup for route change animations (if any)
  }, []);

  return (
    <AnimatePresence exitBeforeEnter>
      {isAnimating ? (
        // You can render a loading spinner or other loading UI here
        <div>Loading...</div>
      ) : (
        <Component {...pageProps} key={router.route} />
      )}
    </AnimatePresence>
  );
}

export default MyApp;
  1. Make sure to install the necessary dependencies:
bash
npm install framer-motion

In this example, I'm using framer-motion for animations and AnimatePresence to handle exit animations. You can customize this further based on your animation library or preferences.

Note: This is a basic example, and you may need to adapt it to your specific use case and animation library. Additionally, consider adding more complex logic or transitions based on your application requirements.

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