A common React pitfall is trying to access an updated state value immediately after calling setState or the state setter from useState. This doesn’t work because state updates are asynchronous….
Forgetting to Remove Timers on Unmount in React The Memory Leak Problem A common React mistake is creating timers with setInterval but forgetting to clean them up when components unmount:….
Using Deprecated React Lifecycle Methods The Problem with Legacy Lifecycle Methods React has deprecated several class component lifecycle methods, including: These were replaced because: Why You Should Stop Using componentWillMount….
Why You Should Never Ignore React Warnings React’s console warnings exist to prevent: Common Warnings Developers Ignore (But Shouldn’t) 1. “Missing dependency” Warnings Risk: Stale closures that use outdated prop/state….
Optimizing useEffect Dependencies A common React performance pitfall is including unnecessary dependencies in the useEffect dependency array, which can lead to excessive re-renders, infinite loops, or stale closures. The Problem:….
Proper Async Cleanup in useEffect A common React anti-pattern is not properly handling cleanup for asynchronous operations in useEffect, which can lead to memory leaks and state updates on unmounted….
An infinite loop in useEffect due to incorrect dependencies occurs when the dependencies in the dependency array of useEffect cause the effect to re-run indefinitely. This happens because the state….
When using useEffect to handle subscriptions or similar side effects in React, it’s important to properly clean up those subscriptions when the component is unmounted or when the effect dependencies….
Handling Non-Serializable Values in useEffect Dependencies A common React performance pitfall occurs when passing non-serializable values (like functions, class instances, or complex objects) into a useEffect dependency array. This can….
Understanding Asynchronous State Updates in React A common pitfall in React development is trying to access updated state values immediately after calling setState or the state setter from useState. This….
