React 18: Issues with Memoization of Components Causing Unnecessary Re-Renders
I'm working on a project and hit a roadblock. I've been banging my head against this for hours. I'm currently working on a React 18 application and I’m facing an issue with component re-renders that are affecting performance. I have a parent component that renders a list of child components, and I’m using `React.memo` to optimize these child components. However, I’ve noticed that even when the props for the child components don’t change, they are still re-rendering. Here’s a simplified version of my code: ```jsx import React, { useState } from 'react'; const ChildComponent = React.memo(({ name }) => { console.log(`Rendering: ${name}`); return <div>{name}</div>; }); const ParentComponent = () => { const [names, setNames] = useState(['Alice', 'Bob', 'Charlie']); const [count, setCount] = useState(0); const increaseCount = () => { setCount(count + 1); }; return ( <div> <button onClick={increaseCount}>Increase Count</button> <div> {names.map((name) => ( <ChildComponent key={name} name={name} /> ))} </div> </div> ); }; ``` The console logs show that the `ChildComponent` is re-rendering every time I click the button, even though the `name` prop is the same. I’ve tried to wrap the `ChildComponent` in `React.memo`, and I thought that should prevent unnecessary re-renders. I’ve also attempted to implement a custom comparison function with `React.memo`, but it didn’t resolve the issue either: ```jsx const ChildComponent = React.memo(({ name }) => { console.log(`Rendering: ${name}`); return <div>{name}</div>; }, (prevProps, nextProps) => { return prevProps.name === nextProps.name; }); ``` Still getting re-renders! I feel like I’m missing something fundamental about how React handles state and memoization. Can anyone point me in the right direction or suggest a solution that might fix this issue? I'm using React 18 and functional components exclusively. Thanks! This is part of a larger service I'm building. Any help would be greatly appreciated!