js获取_后台数据

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

axios.get('https://api.example.com/data')
  .then(response => {
    console.log(response.data);
  })
  .catch(error => {
    console.error('There has been a problem with your axios operation:', error);
  });

Access-Control-Allow-Origin: *

function fetchWithRetry(url, options, retries = 3) {
  return fetch(url, options).then(response => {
    if (response.ok) return response.json();
    if (retries > 0) {
      return fetchWithRetry(url, options, retries - 1);
    }
    throw new Error('Max retries reached');
  }).catch(error => {
    if (retries > 0) {
      return fetchWithRetry(url, options, retries - 1);
    }
    throw error;
  });
}