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Скачать или смотреть How to Prevent Re-Render of Await in React Suspense

  • vlogize
  • 2025-02-21
  • 3
How to Prevent Re-Render of Await in React Suspense
Prevent re-render of Await in React Suspensejavascriptreact routerreact suspensereactjs
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Описание к видео How to Prevent Re-Render of Await in React Suspense

Learn how to efficiently use React Suspense and prevent functions from being called multiple times when working with Await from React-Router-DOM.
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This video is based on the question https://stackoverflow.com/q/78183245/ asked by the user 'Faraz Rabbani' ( https://stackoverflow.com/u/17454269/ ) and on the answer https://stackoverflow.com/a/78183313/ 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, comments, revision history etc. For example, the original title of the Question was: Prevent re-render of Await in React Suspense

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.
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Introduction

When developing applications with React, managing asynchronous data fetching can sometimes lead to unintended behavior, particularly when using features like Suspense and Await from React-Router-DOM. A common challenge developers face is preventing certain functions, like navigation or alert displays, from being triggered multiple times during the rendering process. This article will explore a solution to avoid this problem by abstracting side-effects and managing them within a component.

The Problem

In a situation where you want to handle promise resolution using Suspense and control navigation based on data received, you may encounter issues with functions such as navigate or showAlert being called multiple times. This typically happens when the component re-renders or when React's development mode (particularly React.StrictMode) invokes certain lifecycle methods more than once.

A Closer Look at the Code

Below is an example of the original implementation that leads to this double-calling issue:

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

In this setup, if resolvedData.type equals "warning", both showAlert and navigate are executed. This can lead to multiple calls since the component can re-render.

The Solution

Using a Side-Effect Component

To manage side effects more efficiently, we can create a dedicated component that handles these effects using the useEffect hook. This will ensure that we separate state management logic from the rendering logic, minimizing the chances of unintended re-renders.

New DataHandler Component

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

Implementing the Solution in VerifyToken

We will now refactor VerifyToken to include this new DataHandler component:

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

Key Benefits of This Approach

Separation of Concerns: By isolating the alert and navigation logic, we enhance code readability and maintainability.

Controlled Side Effects: The useEffect hook facilitates controlled execution of side-effects based on specific dependencies.

Enhanced Reliability: Reducing the risk of duplicated executions mitigates the potential for bugs during state transitions.

Conclusion

By restructuring the original approach using a dedicated component for handling side effects, developers can prevent unwanted re-renders and ensure a smoother experience in React applications. This method encapsulates the behavior needed for managing states, leading to cleaner and more efficient code.

Implementing this pattern allows for a more predictable application behavior and ultimately makes debugging easier for developers. Try incorporating this structure into your own projects to experience its benefits firsthand.

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