Type inference with any versus unknown

any-vs-unknown.ts

const foo: any = 42;

if (foo !== undefined && typeof foo !== 'string') {
	throw new Error('foo must be a string if defined');
}

console.log(foo); // foo: any


const bar: unknown = 42;

if (bar !== undefined && typeof bar !== 'string') {
	throw new Error('bar must be a string if defined');
}

console.log(bar); // bar: string | undefined