TypeScript 'satisfies' Operator

The satisfies operator ensures type safety while preserving the exact type. Better than type assertions because it catches errors at compile time!

Example#

// Using satisfies
const config = {
  apiUrl: "https://api.example.com",
  timeout: 5000,
} satisfies {
  apiUrl: string;
  timeout: number;
};

// config still has exact types, not just the interface
config.timeout = 10000; // This works!

This gives you both type safety and type inference!