React 18: Handling State Updates in a Debounced Input Component Causes Unexpected Rerenders
I'm attempting to set up I'm following best practices but I'm having a hard time understanding I’m currently building a search input component in React 18 that debounces user input to minimize API calls. However, I'm running into an issue where the component seems to rerender every time the debounced value updates, even though I expect it to only trigger a fetch when the user has paused their input. I'm using a custom hook for the debouncing logic, and while it works as intended, the rerendering is causing performance issues. Here’s the debounced input component I have: ```jsx import React, { useState } from 'react'; import useDebounce from './useDebounce'; const SearchInput = ({ onSearch }) => { const [inputValue, setInputValue] = useState(''); const debouncedInputValue = useDebounce(inputValue, 300); const handleChange = (e) => { setInputValue(e.target.value); }; React.useEffect(() => { if (debouncedInputValue) { onSearch(debouncedInputValue); } }, [debouncedInputValue, onSearch]); return <input type="text" value={inputValue} onChange={handleChange} />; }; ``` The `useDebounce` hook looks like this: ```jsx import { useEffect, useState } from 'react'; const useDebounce = (value, delay) => { const [debouncedValue, setDebouncedValue] = useState(value); useEffect(() => { const handler = setTimeout(() => { setDebouncedValue(value); }, delay); return () => { clearTimeout(handler); }; }, [value, delay]); return debouncedValue; }; ``` Although the input value debounces correctly, I notice that any state changes in `SearchInput` cause unnecessary rerenders. I’ve tried using `React.memo` to wrap `SearchInput`, but that didn’t seem to help. I even checked to see if `onSearch` is stable (it is, since I'm using `useCallback`), but the component still rerenders whenever the input changes. Is there a best practice for managing this situation or a way to prevent these excessive rerenders? I’ve also considered changing the way I handle state updates or the debounce logic, but I’m unsure of the best approach. Any insights would be greatly appreciated! My development environment is Windows 11. Is there a simpler solution I'm overlooking? I'm developing on Ubuntu 22.04 with Javascript. Is this even possible? I'm coming from a different tech stack and learning Javascript. What's the correct way to implement this?