TypeScript Best Practices in 2024

TypeScript continues to evolve. Here are current best practices for writing better TypeScript code.

Strict Mode

Always enable strict mode in your tsconfig.json:

{

  "compilerOptions": {
    "strict": true
  }
}

Use Type Inference

Let TypeScript infer types when possible:

// Prefer this

const items = [1, 2, 3];
// Over this
const items: number[] = [1, 2, 3];

Discriminated Unions

Use discriminated unions for type-safe state management:

type State = 

  | { status: 'loading' }
  | { status: 'success'; data: Data }
  | { status: 'error'; error: Error };

Utility Types

Leverage built-in utility types:

Partial - Make all properties optional

Required - Make all properties required

Pick - Pick specific properties

Omit - Omit specific properties

Conclusion

TypeScript's type system is powerful. Use it to catch errors early and document your code's intent.