TypeScript Best Practices

TypeScript has become an essential tool in modern web development. Let’s explore the best practices for writing clean, maintainable TypeScript code.

Type Safety

TypeScript’s main benefit is its type system. Here’s how to use it effectively:

// Use interfaces for object shapes
interface User {
  id: number;
  name: string;
  email: string;
  role: 'admin' | 'user';  // Union types for specific values
}

// Use type aliases for complex types
type UserResponse = {
  data: User;
  status: number;
  message: string;
}

Modern Features

TypeScript 5.0 introduced several new features:

• Decorators
• Const assertions
• Template literal types
• Improved type inference

Best Practices

1. Use strict mode
2. Prefer interfaces over type aliases
3. Use readonly when possible
4. Leverage utility types
5. Write self-documenting code