“in”表達式的左側必須是私有標識符或類型為“any”、“string”、“number”或“symbol”

Question

如何修復此類型錯誤，即使我已經將字符串類型定義為關鍵參數。

function checkIsExistObjectKeys(object: Object, key: String): Boolean {
  return key in object;
}

console.log(
  checkIsExistObjectKeys(
    {
      name: "john",
      lastName: "Francois",
    },
    "name"
  )
);

Answer 1

key 參數的類型應該是string ，而不是String 。

Answer 2

function checkIsExistObjectKeys(object: Object, key: string): Boolean {
  return Object.keys(object).some(x => x === key);
}