在JavaScript中使用嵌套对象展平数组的第一个元素

const nestedArray = [
  {
    id: 1,
    details: {
      name: 'Alice',
      age: 30,
      address: {
        city: 'Wonderland',
        zip: '12345'
      }
    }
  },
  // ...其他元素
];

function flattenObject(obj) {
  const result = {};
  for (const key in obj) {
    if (typeof obj[key] === 'object' && obj[key] !== null && !Array.isArray(obj[key])) {
      const nested = flattenObject(obj[key]);
      for (const nestedKey in nested) {
        result[key + '.' + nestedKey] = nested[nestedKey];
      }
    } else {
      result[key] = obj[key];
    }
  }
  return result;
}

function flattenFirstElement(array) {
  if (array.length === 0) return {};
  return flattenObject(array[0]);
}

const flattenedFirstElement = flattenFirstElement(nestedArray);
console.log(flattenedFirstElement);