PRB: document.readyState Not in Sync with Download in IFrame

ID: Q188763

The information in this article applies to:

Microsoft Internet Explorer (Programming) versions 4.0, 4.01, 4.01sp1, 5.0, 5.0dp1

SYMPTOMS

When you insert an IFrame using insertAdjacentHTML, the readyState is not in sync with the download of the document in the new IFrame. If you check the value of document.readyState immediately after the insertAdjacentHTML, the readyState is set to complete, even though the document in the IFrame has not finished loading.

STATUS

The behavior is by design. Once a document goes readystate complete, Internet Explorer does not fire onreadystatechange again.

MORE INFORMATION

Steps to Reproduce Behavior

Here is HTML code that reproduces the problem. When you press the button, an IFrame is inserted before the end of the body. Then, a message box is displayed to show the value of document.readyState. At this point, document.readyState is set to complete. The readyState should change as the document in the IFrame is downloaded.


<HTML>
<HEAD>
   <TITLE>IFrame/readyState Bug</TITLE>

   <SCRIPT LANGUAGE="VBScript">
   Sub btn_onClick
      document.body.insertAdjacentHTML "BeforeEnd", _
         "<IFRAME SRC='http://www.microsoft.com'></IFRAME>"

      MsgBox "ReadyState: " + document.readyState
   End Sub
  </SCRIPT>
</HEAD>
<BODY>
   <BUTTON ID="btn">Insert IFrame</BUTTON>
</BODY>
</HTML>

REFERENCES

For more information, please see the MSDN Web Workshop:

http://msdn.microsoft.com/workshop/default.asp

Additional query words:

Keywords : kbnokeyword kbIE401 kbIE401sp1 kbIE500dp1 kbIE500
Version :
Platform :
Issue type : kbprb