How to compare the current pathname and route in next. Js ?

In Next.js, there are multiple approaches to retrieve the current pathname and routing information. A common method involves using Next.js's useRouter hook. useRouter is a React hook designed to access the router object within page components. Here is an example of retrieving the pathname:

javascript
import { useRouter } from 'next/router';

function MyComponent() {
  const router = useRouter();

  console.log(router.pathname); // Current page's pathname
  console.log(router.query);    // Current page's query parameters
  console.log(router.asPath);   // Actual path displayed in the browser's address bar

  // Additional business logic...

  return (
    <div>
      Current path is: {router.pathname}
    </div>
  );
}

In this example, we first import useRouter from next/router. Within the component, calling useRouter returns the current router object, which contains routing details for the page. Specifically, router.pathname represents the current page's pathname, router.query accesses URL query parameters, and router.asPath indicates the actual path visible in the browser's address bar, including query parameters.

If you are developing a Server-Side Rendered (SSR) page or a Static Generated (SSG) page and need to access routing information within getServerSideProps or getStaticProps functions, you can utilize the context parameter:

javascript
export async function getServerSideProps(context) {
  const { params, query, pathname } = context;

  // Use params, query, and pathname to retrieve routing information
  // Perform data fetching or processing

  return {
    props: {}, // Passed to the page component
  };
}

// Usage for getStaticProps is similar
export async function getStaticProps(context) {
  const { params, query, pathname } = context;

  // ... additional logic

  return {
    props: {},
    revalidate: 10, // Specify revalidation interval in seconds
  };
}

Here, the context object includes properties like params (dynamic route parameters), query (query parameters), and pathname (path name). This approach is primarily used during data fetching, such as retrieving data from external APIs before page rendering.

In summary, using the useRouter hook in client-side components provides a direct way to retrieve the current pathname and routing information. For data fetching methods like getServerSideProps or getStaticProps, routing information is accessed through the context parameter passed to these functions.