TypeScript Tips and Tricks

TypeScript provides powerful type system features that can help you write safer and more maintainable code.

Utility Types

TypeScript provides several utility types:

type Partial<T> = { [P in keyof T]?: T[P] };
type Required<T> = { [P in keyof T]-?: T[P] };
type Pick<T, K extends keyof T> = { [P in K]: T[P] };

Type Guards

Use type guards to narrow types:

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

Generics

Generics allow you to create reusable components:

function identity<T>(arg: T): T {
  return arg;
}