When should I avoid using useEffect in React?

You should avoid useEffect for calculating derived state from props, handling user events directly, or resetting component state when a prop changes (where a 'key' prop is more efficient).

How does this skill help with React performance?

It identifies redundant re-renders caused by chained state updates and suggests using useMemo or render-time calculations to keep the UI responsive.

What are the recommended alternatives to Effects?

Key alternatives include moving logic into event handlers, calculating values during the render phase, and using the 'key' prop to reset component state.

Can this skill help with data fetching patterns?

Yes, it guides you through implementing Effects with proper cleanup functions to prevent race conditions and memory leaks, or suggests framework-specific fetching tools.

React useEffect Best Practices

Name: React useEffect Best Practices
Author: softaworks

bysoftaworks

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347

Learning & Documentation

Optimizes React component logic by enforcing official best practices for Effects, state synchronization, and derived values.

About

This skill equips Claude with the definitive guidance from React's official documentation regarding the use of side effects. It helps developers treat Effects as an 'escape hatch' for external systems rather than a tool for data transformation. By applying this skill, Claude can identify when to replace complex Effects with simpler patterns like render-time calculations, the useMemo hook, or key-based state resetting, leading to more maintainable and performant React applications.

Key Features

Provides alternatives for derived state and expensive calculations
Ensures proper cleanup logic for data fetching and subscriptions
347 GitHub stars
Identifies and removes unnecessary Effects in React components
Guides the transition from Effect-based logic to Event Handlers
Detects common anti-patterns like state-chaining and redundant synchronization

Use Cases

Refactoring a component to eliminate redundant state updates and performance bottlenecks
Implementing robust data fetching logic with proper synchronization and cleanup
Auditing React codebases for 'You Might Not Need an Effect' compliance

About

Key Features

Provides alternatives for derived state and expensive calculations
Ensures proper cleanup logic for data fetching and subscriptions
347 GitHub stars
Identifies and removes unnecessary Effects in React components
Guides the transition from Effect-based logic to Event Handlers
Detects common anti-patterns like state-chaining and redundant synchronization

Use Cases

Refactoring a component to eliminate redundant state updates and performance bottlenecks
Implementing robust data fetching logic with proper synchronization and cleanup
Auditing React codebases for 'You Might Not Need an Effect' compliance