ReactJS - Handling dynamic class names based on multiple state conditions without performance hits
Could someone explain I've tried everything I can think of but I'm working on a personal project and I'm relatively new to this, so bear with me..... I'm trying to conditionally apply class names to a component based on multiple pieces of state in React, but I'm working with performance optimization with unnecessary re-renders. I'm using functional components and hooks in React 18.0.0. I have a component that changes styles based on three different states: `isActive`, `isDisabled`, and `isLoading`. For example, I want the class to be 'active' if `isActive` is true, 'disabled' if `isDisabled` is true, and 'loading' if `isLoading` is true. Here’s a simplified version of my component: ```jsx import React, { useState } from 'react'; const MyButton = () => { const [isActive, setIsActive] = useState(false); const [isDisabled, setIsDisabled] = useState(false); const [isLoading, setIsLoading] = useState(false); const classNames = `${isActive ? 'active' : ''} ${isDisabled ? 'disabled' : ''} ${isLoading ? 'loading' : ''}`.trim(); return ( <button className={classNames} disabled={isDisabled} onClick={() => setIsActive(prev => !prev)}> {isLoading ? 'Loading...' : 'Click Me'} </button> ); }; ``` Initially, I thought this would be straightforward, but I noticed that every state change leads to a re-render, which causes performance optimization when the component is part of a larger list. I've tried using `React.memo`, but it doesn't seem to help. I also considered using `useMemo` to memoize the class names, but I'm not sure if that's the best approach. I get the following behavior in the console sometimes: `Warning: Too many re-renders. React limits the number of renders to prevent an infinite loop.` This occurs when I rapidly toggle the button state. How can I optimize this pattern to avoid unnecessary re-renders and still achieve the dynamic class application? Any advice would be greatly appreciated! For context: I'm using Javascript on Linux. This is my first time working with Javascript 3.9. Any help would be greatly appreciated! I'm developing on Debian with Javascript. Hoping someone can shed some light on this. Am I missing something obvious?