Clean Code JavaScript – Object & Class Patterns

Table of Contents

• Encapsulation
• Immutability
• Cohesion

Encapsulation

// ❌ Bad
user.name = 'John';

// ✅ Good
user.rename('John');

Immutability

// ❌ Bad
user.age++;

// ✅ Good
const updatedUser = user.withAge(user.age + 1);

Cohesion

// ❌ Bad
class User {
  calculateTax() {}
}

// ✅ Good
class TaxCalculator {
  calculate(user) {}
}