react-hooks

Analyze React Hooks code for dependency arrays and stale closures.

1|Updated Mar 6, 2026

Search Tags:#debugging #frontend #react #optimization #javascript #hooks

Ready to run

npx skills add https://github.com/chavangorakh1999/sde-skills --skill react-hooks-chavangorakh1999

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: react-hooks
Source: https://github.com/chavangorakh1999/sde-skills/tree/main/mern-stack/skills/react-hooks
Command: npx skills add https://github.com/chavangorakh1999/sde-skills --skill react-hooks-chavangorakh1999

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps developers understand and correctly implement React Hooks, preventing common bugs related to dependency arrays, stale closures, and premature optimization.

Core Features & Use Cases

useEffect Correctness: Ensures proper dependency array usage and cleanup functions.
Stale Closures: Identifies and fixes issues where functions capture outdated state or props.
useMemo/useCallback Optimization: Guides on when and how to use these hooks effectively, avoiding unnecessary re-renders.
Custom Hook Extraction: Demonstrates patterns for abstracting reusable stateful logic.
Use Case: Debugging a React component where data isn't updating correctly after a prop change, or where a setInterval inside useEffect is causing unexpected behavior.

Quick Start

Analyze the provided React component code for potential issues with useEffect dependency arrays and stale closures.

Frequently Asked Questions about react-hooks

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

Why does my React useEffect hook capture outdated state and props?▼

Your React useEffect hook captures outdated state due to stale closures, occurring when inner functions reference variables from previous renders. Fixing stale closures requires correcting the dependency array to ensure effects re-run with current values.

How do I fix a React component where data isn't updating correctly after a prop change?▼

To fix data not updating after a prop change in a React component, analyze the useEffect dependency array to ensure it includes all external references. Missing dependencies cause the effect to skip execution when props update.

When should I use useMemo and useCallback for React component optimization?▼

Use useMemo and useCallback for React optimization when preventing expensive unnecessary re-renders of child components. These hooks memoize values and functions, but premature optimization introduces complexity and stale closure bugs if dependencies are mismanaged.

What is the best way to extract custom hooks from reusable stateful logic?▼

The best way to extract custom hooks from reusable React stateful logic is to identify repeated useEffect and useState patterns across components, then abstract them into a single function starting with 'use', ensuring all dependencies are correctly passed through.

Why is my setInterval inside useEffect causing unexpected behavior in React?▼

A setInterval inside useEffect causes unexpected behavior when the cleanup function is missing or the dependency array is incorrect. Without a proper cleanup, intervals stack up across re-renders, leading to multiple simultaneous timers updating state unexpectedly.