unknown vs any: The Safer Choice

TypeScript 3.0 introduced the `unknown` type as a type-safe alternative to `any`. In this lesson you'll learn what makes `unknown` safer and when to use it.

With `any`, TypeScript turns off all checks. You can call methods, access properties, and assign to typed variables without restriction — and without safety.

let val: any = getData();
val.someMethod(); // TypeScript: OK. Runtime: possible crash