Integrating React Query with Server Side Rendering in Next.js

Описание: Learn how to effectively use `React Query` with `Next.js` for server-side rendering and data fetching. This guide breaks down key concepts and offers a solution to common issues.
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Integrating React Query with Server Side Rendering in Next.js

When building applications with React, many developers turn to Next.js for its powerful server-side rendering capabilities. However, integrating data fetching libraries like React Query can present challenges, especially when trying to prefetch data on the server. A common issue faced in this scenario is that individual item queries may not execute on the server but only on the client. In this post, we'll explore this problem and provide a practical solution for integrating React Query with server-side rendering in Next.js.

Understanding the Problem

In a typical scenario, you may want to fetch data for a list of items and, subsequently, fetch additional details for each item when the list is rendered. In our example, we are working with data from the Pokemon API. The expectation is that both the list of Pokemon and their detailed data should be prefetched on the server for a better user experience.

However, as you try to fetch each Pokemon's details inside a component using useQuery, you encounter an issue where the data appears as undefined on the server but is accessible on the client side. This can lead to inconsistencies and affect the overall performance of the application.

The Original Code Structure

Here’s a simplified version of the initial code structure:

[[See Video to Reveal this Text or Code Snippet]]

The Solution

To resolve the issue where individual queries for each Pokemon were not executing on the server, we combined our fetching logic into a single function that handles the fetching of both the list of Pokemon and their individual details in one go. Here’s how to do it:

Step 1: Combine Fetching Functions

Instead of fetching each Pokemon in the getStaticProps, we create a new function that fetches both the list of Pokemons and their details.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Update the Home Component

Next, we use this combined function in our home component, just like before:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Simplify getStaticProps

Now, your getStaticProps function can remain cleaner and more efficient:

[[See Video to Reveal this Text or Code Snippet]]

Key Takeaways

When using React Query with Next.js, it’s essential to manage data fetching efficiently to ensure that both the list and detail data are available at render time.

Combining fetching functions can lead to cleaner code and improved performance, especially when working with server-side rendering.

Always ensure your data structures are properly populated before rendering, particularly in server-rendered contexts.

By following the provided approach, you should successfully be able to leverage the full potential of React Query with server-side rendering in Next.js, ensuring your application runs smoothly and efficiently.

If you face any more challenges or have questions about integrating these tools, feel free to reach out for assistance!