在js用ajax请求数据格式

fetch('https://api.example.com/data')
  .then(response => {
    if (!response.ok) {
      throw new Error('Network response was not ok');
    }
    return response.json(); // 解析JSON数据
  })
  .then(data => console.log(data))
  .catch(error => console.error('There has been a problem with your fetch operation:', error));

fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => {
    try {
      // 处理数据
    } catch (e) {
      console.error('Error parsing JSON:', e);
    }
  })
  .catch(error => console.error('Fetch error:', error));

function fetchWithTimeout(url, options, timeout = 7000) {
  return Promise.race([
    fetch(url, options),
    new Promise((_, reject) =>
      setTimeout(() => reject(new Error('timeout')), timeout)
    )
  ]);
}

fetchWithTimeout('https://api.example.com/data')
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error('Fetch error:', error));