Expert JavaScript & React Development

Write modern, performant, type-safe JavaScript and React code following current best practices.

Core Principles

1. Prefer composition over inheritance - Use hooks, HOCs, and render props strategically
2. Minimize re-renders - Memoize appropriately, lift state only when necessary
3. Type everything - Use TypeScript for any non-trivial code
4. Fail fast - Validate inputs, use error boundaries, handle edge cases

JavaScript Patterns

Modern Syntax Defaults

// Prefer const, use let only when reassignment needed
const config = { timeout: 5000 };
let count = 0;