React hook conditional. Only call Hooks from React function .

React hook conditional Jun 3, 2021 · React basically knows which useEffect hook is which, by counting invocations. Instead, always use Hooks at the top level of your React function, before any early returns. Don’t call Hooks inside loops, conditions, nested functions, or try / catch / finally blocks. Calling useEffect conditionally is bad, specifically because the amount of times useEffect gets called cannot change. . Jun 3, 2021 · React basically knows which useEffect hook is which, by counting invocations. The eslint-rule is there to enforce good practices and proper usage of React hooks, therefore you should just move your hooks to the top and put your if right before you are ready to render some JSX. Whether you're working with modals, event listeners, or other complex components, this pattern keeps your codebase maintainable and bug-free. Your example is conditional, but React can't detect it because in either condition you call it once. That'd be the best and right way to conditionally render a component which uses hooks. Jan 28, 2025 · This code demonstrates how to create a modal in React that closes automatically when you click outside of it. Don’t call Hooks inside loops, conditions, or nested functions. It uses a custom hook called useOnClickOutside to detect clicks outside a specified Functions whose names start with use are called Hooks in React. Only call Hooks from React function Nov 18, 2021 · I want to call a different hook according to a variable this value comes from URL parameters and is dynamic, but hooks can't run conditionally according to Hook's rules: return useHookOne(accountId, statementId) return useHookTwo(accountId, statementId) return useHookThree(accountId, statementId) Nov 27, 2024 · The Conditional React Hooks Pattern offers a clean, reusable way to manage dynamic behaviors in React while adhering to the Rules of Hooks. Jul 6, 2019 · The React docs state the following rules for Hooks: Only call Hooks at the top level. ktjb ofjt nsrp vam wbdtc kasf rakq bvxs syubt unsqgc paryqqny rivsv voexs qqokh jbz