More possible approached to prevent useEffect running twice
- Review the dependency array of the useEffect hook and ensure that it includes only the necessary dependencies. If the useEffect hook relies on specific state or props, include those dependencies in the dependency array to control when the effect should run.
- If the useEffect hook should only run once when the component mounts, ensure that the dependency array is empty ([]). This tells React to run the effect only once when the component mounts and not re-run it on subsequent re-renders.
- If the useEffect hook depends on global state or context values, consider optimizing the component rendering to minimize unnecessary re-renders. You can use React.memo for functional components or shouldComponentUpdate for class components to prevent re-renders when the component’s props or state haven’t changed.
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