Steps to Solve useEffect Running Twice
- Understand the Error: Reacts useEffect hook is designed to handle side effects in function components. When useEffect runs twice, it can lead to unexpected behavior and performance issues in your application.
- Using React Strict Mode: Enable React Strict Mode in your application to detect and highlight potential issues during development. React Strict Mode helps identify common mistakes and encourages best practices for React development.
- Remove Strict Mode : While React Strict Mode performs additional checks and warnings to help you identify and fix potential issues in your application, it may also inadvertently trigger re-renders and cause the useEffect hook to run multiple times. Removing Strict Mode can sometimes resolve the issue of useEffect running twice by eliminating these additional checks and allowing the component to render only once.
How to Fix React useEffect running twice in React 18 ?
In React applications, the useEffect hook is commonly used for handling side effects, such as data fetching, subscriptions, or manually changing the DOM. However, encountering the issue of useEffect running twice can lead to unexpected behavior and impact the performance of your application. In this article, we’ll explore various approaches to resolve this error and provide examples for each approach.
Table of Content
- Why useEffect is running twice?
- Approaches for Resolving the Error
- Steps to Solve useEffect Running Twice
- Some other reasons are as follows
- More possible approached to prevent useEffect running twice
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