无法读取未定义的属性(读取'then')

function fetchData() {
  return new Promise((resolve, reject) => {
    resolve("Data fetched successfully");
  });
}

const result = fetchData();
console.log(result.then); // 这里会报错，因为 result.then 是 undefined

function fetchData() {
  return new Promise((resolve, reject) => {
    resolve("Data fetched successfully");
  });
}

fetchData()
  .then(data => {
    console.log(data); // 正确调用 then 方法
  })
  .catch(error => {
    console.error("Error:", error);
  });