如何在javascript中从url中获取json数据？

function getJSONFromURL(url, callback) {
  var xhr = new XMLHttpRequest();
  xhr.open('GET', url, true);
  xhr.onreadystatechange = function() {
    if (xhr.readyState === 4) {
      if (xhr.status === 200) {
        var response = JSON.parse(xhr.responseText);
        callback(response);
      } else {
        console.error('Failed to fetch JSON from URL: ' + url);
      }
    }
  };
  xhr.send();
}

// 使用示例
var url = 'https://example.com/data.json';
getJSONFromURL(url, function(data) {
  console.log(data);
});