Types in typescript

TypeScript's type system includes primitives (string, number, boolean), unions, intersections, literal types, and type aliases. Type annotations catch errors at compile time. The 'any' type opts out of type checking—avoid it when possible.

type Status = 'active' | 'inactive' | 'pending';
type User = {
  id: number;
  name: string;
  status: Status;
  metadata?: Record<string, unknown>;
};