website/content/posts/typescript-best-practices.md

title, date, categories, tags

title	date	categories	tags
TypeScript Best Practices 2024	2024-07-18	tech tutorial	typescript javascript best-practices

TypeScript Best Practices 2024

Essential TypeScript patterns and practices for better code quality.

Type Definitions

// Use interfaces for object shapes
interface User {
  id: string;
  name: string;
  email: string;
  createdAt: Date;
}

// Use type aliases for unions
type Status = 'loading' | 'success' | 'error';

// Generic constraints
interface Repository<T extends { id: string }> {
  findById(id: string): Promise<T>;
  save(entity: T): Promise<T>;
}

Utility Types

// Partial for updates
function updateUser(id: string, updates: Partial<User>) {
  // Implementation
}

// Pick for specific fields
type UserSummary = Pick<User, 'id' | 'name'>;

// Omit for exclusions
type CreateUser = Omit<User, 'id' | 'createdAt'>;

Best Practices

1. Enable strict mode
2. Use unknown instead of any
3. Prefer type assertions over type casting
4. Use const assertions for immutable data

TypeScript makes JavaScript development so much safer!