Is there a different option to getServerSide in the upcoming 13th edition

I am facing a situation with a component that utilizes "use client" and I need to retrieve data from the server before rendering this page, redirecting based on certain conditions. In older versions of Next.js, I would simply use getServerSideProps, but how can I achieve the same in the latest version?

To tackle this issue, I attempted to implement useEffect with an asynchronous function within it:

useEffect(() => {
    async function fetchData() {
      const response = await fetch(...);
      const data = await response.json();
      
      if (data is invalid) {
          redirect(...)
      }

      // continue with the remaining code
    }
}, []) 

Answer №1

Within the Next 13 app folder, components declared in files annotated with "use client" are executed on the client side (browser) and function similarly to regular React components. These components can utilize hooks and manage user interactions.

To run code on the server side, you must create a server component (declared in a file without "use client"). Server components are asynchronous and cannot use hooks.

In your scenario, you can simply create a server Page component to fetch and display data.

If you need user interaction (such as using a Hook), you can create a server Page component to fetch data and display a client component for user interaction, passing data through props.

Keep in mind that data can be passed from server components to client components (with certain data type restrictions), but not vice versa.

Note: The redirect function is available for server components for redirection purposes. For client components, you can use the useRouter Hook.

Answer №2

If you utilize appDir, the default behavior of the page is as a server-side component. Therefore, when fetching data on the page and passing it to children as props, it should be similar to utilizing getServerSideProps. The only difference is that it is static by default.

For example:

// app/page.tsx

export const dynamic = 'force-dynamic';

async function getPageData() {
  return some data...
}

export default async function Page() {
   const data = await GetPageData();
   // if you don't need to use client components, then you can render here
   return <ChildPageComponent data={data} />
}

Keep in mind: By default, all pages are static. This is equivalent to using getStaticProps and getStaticPaths in the page directory. If you want to make the route segment dynamic, refer to this: https://nextjs.org/docs/app/api-reference/file-conventions/route-segment-config.

Instead of getting stuck, avoid using use-client on the page itself. Instead, designate the ChildPageComponent as the client component. You may need to employ superjson with Next.js to pass data from server components to client components.

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