Скачать или смотреть Handling Asynchronous Data Fetching and Sorting in React Using useEffect and useSearchParams

Learn how to manage data fetching and sorting in React using `useEffect` and `useSearchParams`, ensuring smooth rendering and state management.
---
This video is based on the question https://stackoverflow.com/q/72785135/ asked by the user 'depimomo' ( https://stackoverflow.com/u/8270413/ ) and on the answer https://stackoverflow.com/a/72792093/ provided by the user 'Drew Reese' ( https://stackoverflow.com/u/8690857/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: React useEffect to fetch data not finished yet when try to sort data using React Router useSearchParams

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Handling Asynchronous Data Fetching and Sorting in React

In this guide, we’ll tackle a common challenge when developing with React: handling asynchronous data fetching and sorting data based on query parameters using React Router's useSearchParams. When building a movie list component that fetches data from an API, we sometimes encounter timing issues where the data isn't available when we attempt to manipulate it. This post will explore a solution to ensure that the data is properly fetched before sorting.

The Problem

Imagine you have a React component that fetches movie data from an API (like TMDB) and allows users to sort the movies via buttons that manipulate the URL's query parameters. The twist here is that when you refresh the page with specific query parameters, the component tries to sort the movies before they have finished loading, leading to unexpected behavior.

Key Observations

Initial Load: The movies must be fetched successfully before any sorting happens.

Sorting Mechanism: When you change the sort order, the URL should update to reflect that change, making it shareable.

Proper State Management: Relying solely on states and effects can lead to race conditions if not handled properly.

The Solution

To solve the problem, we’ll adjust how we manage and sort the movie data. Instead of having derived state, we will derive sorted movie data directly from the fetched movies state, based on the current sort parameter. Here’s how to do it step by step.

Step 1: Fetch Movies

First, we'll set up our useEffect to fetch the movies. We’ll use async/await to get the data from the TMDB API:

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

Step 2: Managing Query Parameters

In order to manage sorting through query params, we will be using useSearchParams. This allows us to set and get the sorting order from the URL:

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

Step 3: Sorting Logic

Instead of keeping a sorted state, we will derive the sorted movie list directly from the movies state:

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

Helper Functions

To simplify our sorting logic, we’ll create a utility function:

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

Step 4: Rendering the Sorted Movies

Finally, we will map over the sortedMovies array to render our MovieCard components:

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

Bonus: Memoization

If your movie list is large, consider using useMemo to optimize the sortedMovies calculation:

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

Conclusion

By managing the fetched movie state and sorting logic separately, we ensure a clean implementation that avoids timing issues with asynchronous data loading. This method not only improves the user experience but also keeps your component clean and efficient.

In summary, leverage useEffect for data fetching, useSearchParams for sorting via URL, and derive your sorted state from the main state. This approach is efficient, effective, and easy to manage.