TypeError:尝试读取REST api和display时，无法读取未定义的属性(读取'map')

fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => {
    if (data && data.someProperty) {
      // 处理数据
      console.log(data.someProperty.map(item => item.name));
    } else {
      console.error('数据未正确加载');
    }
  })
  .catch(error => {
    console.error('获取数据时出错:', error);
  });

async function fetchData() {
  try {
    const response = await fetch('https://api.example.com/data');
    const data = await response.json();
    if (data && data.someProperty) {
      // 处理数据
      console.log(data.someProperty.map(item => item.name));
    } else {
      console.error('数据未正确加载');
    }
  } catch (error) {
    console.error('获取数据时出错:', error);
  }
}

fetchData();

function processData(data) {
  if (data && data.someProperty) {
    return data.someProperty.map(item => item.name);
  } else {
    console.error('数据未正确加载');
    return [];
  }
}

fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => {
    const processedData = processData(data);
    console.log(processedData);
  })
  .catch(error => {
    console.error('获取数据时出错:', error);
  });