Using App Router in Next.js for Optimization and Application Analysis

When discussing the construction of an application using the Next.js framework, various tools exist for optimizing and analyzing your application’s performance. One of the main features of Next.js is the ability to use App Router, which allows you to implement a more optimized structure for your application.

Initially, let’s talk about the concept of App Router. This capability can assist you in organizing your application using files and structured folders. This allows for more organized routing and can help facilitate easier management of large applications.

Another key aspect of optimizing applications is discussing data analysis and performance. Various tools exist for this purpose, which can be integrated with App Router. By using these tools, you can gather insights about how users interact with your application.

Data analysis tools such as Google Analytics or location-based tools can assist you in collecting data, analyzing, and enhancing your application's performance. These tools can show the behavior of users and help you continuously improve your application.

Furthermore, we will see how you can initiate a sample application using App Router in Next.js and then add analytical tools to assess its performance.

// pages/_app.js
import React from 'react';
import { useEffect } from 'react';
import { useRouter } from 'next/router';

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

  useEffect(() => {
    const handleRouteChange = (url) => {
      console.log('App is changing to: ', url);
    };
    router.events.on('routeChangeComplete', handleRouteChange);
    return () => {
      router.events.off('routeChangeComplete', handleRouteChange);
    };
  }, [router.events]);

  return ;
}

export default MyApp;

In this simple code example:

import React from 'react'; - This imports the React library at the beginning of our file.

import { useEffect } from 'react'; - Here, we import the useEffect component from React used for executing side effects.

import { useRouter } from 'next/router'; - Next, we import useRouter from the Next.js library to manage routing interactions.

Next, we define the MyApp component, which takes Component and pageProps as parameters and handles their processing.

useEffect(() => {...}, [router.events]); - We use useEffect to log the messages when the route changes.