How come TypeScript remains silent when it comes to interface violations caused by Object.create?

type Foo = {
  x: number;
};

function g(): Foo {
  return {}; // Fails type-check

  // Property 'x' is missing in type '{}' but required in type 'Foo'.
}

function f(): Foo {
  return Object.create({}); // Passes!
}

function h(): Foo {
  return Object.create({x: 0}); // Also passes
}

function j(): Foo {
  return Object.create({x: "Hi"}); // Also passes!
}

What causes f and j to pass type-checking? Can TypeScript be configured so that h passes type-checking while f and j fail?

Answer №1

The method Object.create in Typescript is programmed to output any data type. A previous problem was reported in the Github repository related to this, however, it has been resolved and there are no plans for immediate adjustments.

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