Re: XMLHttpRequest for "HEAD" dumps "no element found" errors

Michael Vincent van Rantwijk wrote:

> I use somehing like this:
> 
> var xmlhttp = new XMLHttpRequest();
> xmlhttp.open("HEAD", aURL, false);
> xmlhttp.onreadystatechange = function() {
>  if (xmlhttp.readyState == 4) {
>   return xmlhttp.getResponseHeader("Last-Modified");
>  }
> }
> xmlhttp.send(null);
> 
> and that works, but it throws JavaScript errors like this:
> 
> Error: [JavaScript Error: "no element found" {file: 
> "http://mozillazine.org/atom.xml" line: 1 column: 1 source: "
> ^"}]
> Source File: http://mozillazine.org/atom.xml
> Line: 1, Column: 1
> Source Code:
> ^

I have tried with Mozilla 1.7.11 and no errors happen, but when I try 
with Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) 
Gecko/20050806 Firefox/1.0+ I see the error so it looks like a 
regression that happened on the trunk after 1.7. Although I don't know 
whether something has changed with XMLHttpRequest and HEAD requests or 
maybe only error reporting, lots of stuff nowadays ends up in the 
JavaScript console although it is not a script error.

Consider filing a bug on the issue and please post the bug number here.

-- 

	Martin Honnen
	http://JavaScript.FAQTs.com/