如何发射“上载”事件在IE上的文档 [英] How to fire "onload" event on document in IE
问题描述
我目前正在开发用于检测文档准备情况的JavaScript方法的单元测试。这个代码已经在框架级别，所以请避免提到这个已经在jQuery或其他库中实现了。
我已经成功地模拟了'readystatechange'以下代码：
var event;
event = document.createEventObject（）;
event.type ='readystatechange';
document.fireEvent（'onreadystatechange'，event）;
我没有为'load'事件做同样的事情。以下代码导致IE7中的无效参数错误，在最后一行调用fireEvent引发：
event = document .createEventObject（）;
event.type ='load';
document.fireEvent（'onload'，event）;
有人做过这个，还是以前没有这样做？我也有兴趣以不同的方式来发起活动。
编辑：按照Crescent Fresh的建议，我改变了我的代码：
event = document.createEventObject（）;
event.type ='load';
document.body.fireEvent（'onload'，event）;
没有更多错误，但'onload'的侦听器不会触发。这是我如何配置它：
document.attachEvent（'onload'，listener）;
根据此页面在MSDN ，没有 onload 或 document.body.onload 。这些在IE中是相同的：由于历史原因，< body onload =...> 实际设置 window.onload ，所以MS决定将 document.body.onload 别名为 window.onload 。
这个问题是 - 正如Eric在评论中提到的那样，似乎没有办法手动触发窗口事件，这意味着可能没有解决方案对于埃里克的问题。
I am currently developing Unit Tests for a Javascript method that detects the readiness of the document. This code is already at framework level, so please avoid mentions of this being already implemented in jQuery or another library.
I have successfully simulated the 'readystatechange' change event with the following code:
var event;
event = document.createEventObject();
event.type = 'readystatechange';
document.fireEvent('onreadystatechange',event);
I failed to do the same for the 'load' event. The following code results in an invalid argument error in IE7, thrown by the call to fireEvent on the last line:
event = document.createEventObject();
event.type = 'load';
document.fireEvent('onload',event);
Has anyone done this, or failed to do this before? I am also interested in any suggestion to fire the event in a different way.
Edit: following the suggestion by Crescent Fresh, I changed my code to:
event = document.createEventObject();
event.type = 'load';
document.body.fireEvent('onload',event);
There is no more error, but the listener for 'onload' does not fire. Here is how I configured it:
document.attachEvent('onload',listener);
According to this page at MSDN, there's no onload event for document.
You want either window.onload or document.body.onload. These are identical in IE: for historical reasons, <body onload="..."> actually sets window.onload, so MS decided to make document.body.onload an alias of window.onload.
The problem with this is - as Eric mentioned in the comments - that there doesn't seem to be a way to manually fire window events, which means that there might not be a solution for Eric's problem.
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