检查对象是否从其他文件中的API调用中返回值

// api.js
export function getData() {
  return { key: 'value' };
}

// main.js
import { getData } from './api.js';

const data = getData();
console.log(data); // 输出: { key: 'value' }

// api.js
export async function fetchData() {
  return new Promise((resolve) => {
    setTimeout(() => resolve({ key: 'value' }), 1000);
  });
}

// main.js
import { fetchData } from './api.js';

async function main() {
  const data = await fetchData();
  console.log(data); // 输出: { key: 'value' }
}

main();

// api.js
export async function fetchData() {
  try {
    const response = await fetch('https://example.com/data');
    if (!response.ok) throw new Error('Network response was not ok');
    return await response.json();
  } catch (error) {
    console.error('Fetch error:', error);
    throw error;
  }
}

// main.js
import { fetchData } from './api.js';

async function main() {
  try {
    const data = await fetchData();
    console.log(data);
  } catch (error) {
    console.error('Main error:', error);
  }
}

main();