Modern JavaScript Patterns

Master ES6+ features and functional programming for clean, efficient code.

Arrow Functions

// Basic syntax
const add = (a, b) => a + b;
const double = x => x * 2;
const getRandom = () => Math.random();

// Multi-line (need braces)
const processUser = user => {
  const normalized = user.name.toLowerCase();
  return { ...user, name: normalized };
};