问Javascript向所有新Image()实例添加侦听器或自动添加属性

EN

(function() {
  var img;
  var Image = function Image() {
    return img = new (Function.prototype.bind.apply(window.Image, arguments));
  }

  // This is where the 3rd party code should be injected.
  // I'm assuming that since you're including it on your page, you know its source and trust it enough to `eval` it.
  // You won't be able to use a `<script>` tag to load it since that would execute in the global scope.
  // You'll likely need to use AJAX to fetch the script contents and pass to eval here.
  eval("new Image().src = some_image_path");

  return img;
})().src == some_image_path;

<script>
  var img;
  var oldImage = Image;
  Image = function Image() {
    return img = new (Function.prototype.bind.apply(oldImage, arguments));
  }
</script>

<script src="..."></script>

<script>
  // img now contains the instantiated `Image` object
  img.src; // do what you will with this

  // Clean up
  Image = oldImage;
</script>