Скачать или смотреть Simplifying Async Calls in React's useEffect Hook

Learn how to simplify your async calls in React's useEffect hook using IIFE or promises! Discover effective strategies to streamline your code.
---
This video is based on the question https://stackoverflow.com/q/63144482/ asked by the user 'Pete' ( https://stackoverflow.com/u/9101619/ ) and on the answer https://stackoverflow.com/a/63144550/ provided by the user 'Elias Schablowski' ( https://stackoverflow.com/u/11986202/ ) 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: How to simplify an async call inside a React useEffect Hook

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.
---
Simplifying Async Calls in React's useEffect Hook

When working with React, one common challenge developers face is managing asynchronous calls within the useEffect hook. You might find yourself trying to create a simple and clean async function within this lifecycle method, but it often leads to complex code wrapped in another function call. In this post, we'll explore how to simplify your async operations in useEffect while keeping your code clean and effective.

The Problem

Suppose you have the following useEffect code that fetches data from an API:

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

This implementation works, but it requires you to define a separate fetchData function inside the useEffect. Asynchronous functions can't be used directly in useEffect, which is often where the confusion arises.

The Solution: Using IIFE (Immediately Invoked Function Expression)

What is IIFE?

An IIFE is a JavaScript function that runs as soon as it is defined. This pattern can be leveraged to simplify your async calls inside useEffect. Here's how you can do it:

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

Explanation

Immediately Invoked Function Expression (IIFE): By wrapping your async function in parentheses and calling it immediately, you avoid the need for a separate function definition.

Promise Handling: The promise allows you to manage the asynchronous call effectively while maintaining clear and concise code.

Alternative Approach: Using Plain Promises

If you prefer not to use IIFE, you can handle your async call using a plain promise:

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

Explanation

Plain Promises: You can directly return the promise from the API call, which is simple and straightforward.

Cleanup: You can still manage cleanup actions when the component unmounts or re-renders.

Conclusion

In the context of React, it's essential to keep your code as clean and efficient as possible. Both IIFE and plain promises offer simplified strategies for managing async operations within useEffect.

However, it's crucial to remember that useEffect cannot be declared as async, as effect callbacks are synchronous to prevent race conditions. By understanding and applying these strategies, you can streamline your code, making it more readable and easier to maintain.

Now you're equipped to handle async calls in your React app more effectively! Happy coding!