如何从图片网址获取状态代码？ 使用Javascript

Question

How would you get a status code from an image url. If the image status code is 404, I'd like to replace it with something else.

Answer 1

You can use onload and onerror events.

<script type="text/javascript">
  function onImageLoad() {
    alert("imgOne is loaded.");
  }

  function onImageLoadError() {
    alert("imgTwo is not loaded.");
  }
</script>
<img src="http://via.placeholder.com/350x150" id="imgOne" onload="onImageLoad(this);" />
<img src="http://via1.placeholder.com/350x150" id="imgTwo" onerror="onImageLoadError(this);" />

JSFiddle .