How to improve the performance of a dynamic modal in React with complex state management?
I'm relatively new to this, so bear with me... I'm working on a project and hit a roadblock. Currently developing a React application where I'm trying to implement a dynamic modal that displays various forms based on user interactions. The modal should update its content and maintain state without a full re-render of the parent component. However, I've noticed a significant performance drop, especially when opening the modal multiple times. I've structured my modal using state management with hooks, particularly `useState` and `useEffect`. Below is a simplified version of my setup: ```javascript const DynamicModal = ({ isOpen, onClose, formType }) => { const [formData, setFormData] = useState({}); useEffect(() => { if (isOpen) { fetchDataForForm(formType).then(data => setFormData(data)); } }, [isOpen, formType]); return isOpen ? ( <div className="modal"> <form> {/* Form fields based on formData */} <button onClick={onClose}>Close</button> </form> </div> ) : null; }; ``` The problem arises when `isOpen` changes, causing the modal to fetch data every time it opens, which leads to noticeable lag. I've tried optimizing the fetch call by adding a loading state, but the heavy lifting still seems to bog down the user experience. To troubleshoot, I considered memoizing the fetched data using `useMemo`, but it didn't yield the performance improvement I hoped for. I also explored utilizing `React.memo`, but the modal's dynamic nature makes this tricky. Does anyone have suggestions for handling complex state management in modals more efficiently or best practices to avoid performance bottlenecks? Any help would be appreciated! This is part of a larger web app I'm building. How would you solve this? This is part of a larger application I'm building. Has anyone else encountered this? My development environment is Windows. Any ideas what could be causing this?