How to Avoid Multiple API Calls in React When Using Hooks

Описание: Learn how to prevent multiple API calls in React using `useReducer`. Simplify your code and improve performance for user searches in your application.
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This video is based on the question https://stackoverflow.com/q/68188672/ asked by the user 'zdd' ( https://stackoverflow.com/u/1487475/ ) and on the answer https://stackoverflow.com/a/68238513/ provided by the user 'LChuan' ( https://stackoverflow.com/u/13917534/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Avoid Multiple API Calls in React When Using Hooks

If you’re developing a React application, you might encounter a frustrating issue: multiple API calls being triggered when a user tries to search for data on a paginated table. This can lead to performance inefficiencies and a poor user experience. In this guide, we will discuss a common scenario and explore an effective solution to this problem. Let's dive in!

The Problem

Consider a situation where you have an AntD table displaying data fetched from a backend server. The problem arises when a user inputs a search condition and clicks the search button. During this action, two API calls are triggered due to the simultaneous state changes causing a cascading effect. Specifically:

The search condition changes when the user enters a new term.

The page number is reset to 1 to show results from the first page.

This behavior leads to the API being called twice: once for the new search condition and again for resetting the page number. So how can you fix this issue and ensure that the API is only called once?

The Solution

To resolve this problem, we can leverage the useReducer hook instead of using useState. This enables us to manage our component state more effectively, ensuring coordinated updates without unnecessary re-renders or API calls. Let’s break it down into organized steps.

Step 1: Replace useState with useReducer

Start by replacing your state management with useReducer. This allows you to consolidate your state updates into a single action, which enhances performance and reduces redundancy. Here is an example of how to set it up:

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

Step 2: Combine Actions into One

Next, you’ll need to modify your search handling function. Instead of separately setting the search condition and page number, combine both actions into a single dispatch. This ensures both updates happen together, reducing the likelihood of multiple API calls:

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

Step 3: Update the useEffect Hook

Lastly, modify your useEffect to utilize the state from useReducer. This allows it to listen for changes in the singular state object rather than individual state variables, preventing multiple API calls when state changes occur in quick succession:

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

Conclusion

By using useReducer, you can effectively manage your state in a more organized manner while avoiding the unreliable behavior of multiple API calls in your React applications. This not only simplifies your code but also improves its maintainability and user experience. So next time you're faced with a similar issue, remember that a well-structured state can save you from unnecessary headaches!

Feel free to apply these concepts in your own projects, and happy coding!