删除iframe时如何触发onunload事件?

删除iframe时如何触发onunload事件?,iframe,triggers,removechild,onunload,Iframe,Triggers,Removechild,Onunload,移除iframe时如何触发其卸载事件 使用下面的代码,当调用removeChild(iframe)时,不会触发onunload事件 <!-- parent.html --> <html> <head> <title>remove iframe</title> <script type="text/javascript"> window.onload = function() {

移除iframe时如何触发其卸载事件

使用下面的代码,当调用removeChild(iframe)时,不会触发onunload事件

<!-- parent.html -->
<html>
  <head>
    <title>remove iframe</title>
    <script type="text/javascript">
      window.onload = function() {
        var button = document.getElementsByTagName("BUTTON")[0];
        button.onclick = function() {
          document.body.removeChild(document.getElementsByTagName("IFRAME")[0]);
        };
      };
    </script>
  </head>
  <body>
    <iframe src="./son.html" />
    <button>Remove iframe</botton>
  </body>
</html>
<!-- son.html -->
<html>
  <head>
    <title>son html</title>
    <script type="text/javascript">
      window.onload = function() { alert("hello"); };
      window.onunload = function() { alert("world!"); };
    </script>
  </head>
  <body style="background-color:#aaccee;">
  </body>
</html>

移除iframe
window.onload=函数(){
var button=document.getElementsByTagName(“按钮”)[0];
button.onclick=函数(){
document.body.removeChild(document.getElementsByTagName(“IFRAME”)[0]);
};
};
移除iframe
子html
window.onload=function(){alert(“hello”);};
window.onunload=function(){alert(“world!”);};

如何触发它?

在删除帧之前,您可以将iframe元素的src属性设置为“about:blank”,检查这是否使iframe触发onnload事件

例如:


它在firefox中工作得很好,但在Chrome中却不行。有什么想法吗?
var iframe = document.getElementsByTagName("IFRAME")[0];
iframe.src = "about:blank";
document.body.removeChild(iframe);