TypeScript Tips and Tricks for Better Code

TypeScript has become the standard for building large-scale JavaScript applications. Here are some tips to write better TypeScript code.

Type Safety Best Practices

Use Strict Mode

Always enable strict mode in your tsconfig.json:

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

Discriminated Unions

Use discriminated unions for better type safety:

type Success = { status: 'success'; data: string };
type Error = { status: 'error'; message: string };
type Result = Success | Error;

Advanced Patterns

Utility Types

TypeScript provides powerful utility types:

• Partial<T>: Make all properties optional
• Required<T>: Make all properties required
• Pick<T, K>: Select specific properties
• Omit<T, K>: Exclude specific properties

Type Guards

Create type guards for runtime type checking:

function isString(value: unknown): value is string {
  return typeof value === 'string';
}

Conclusion

TypeScript helps catch errors early and makes code more maintainable. Use these tips to improve your TypeScript skills!