如何从图片url中获取状态码？Javascript

function getImageStatus(url) {
  return new Promise(function(resolve, reject) {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', url, true);
    xhr.onreadystatechange = function() {
      if (xhr.readyState === 4) {
        if (xhr.status === 200) {
          resolve(xhr.status);
        } else {
          reject(xhr.status);
        }
      }
    };
    xhr.send();
  });
}

var imageUrl = 'https://example.com/image.jpg';
getImageStatus(imageUrl)
  .then(function(status) {
    console.log('Image status:', status);
  })
  .catch(function(error) {
    console.error('Failed to get image status:', error);
  });