Error: The expression `xmlDoc.load` returns a value of undefined, which is not an object

My current challenge involves loading an XML file using Javascript in IE, Firefox, and Safari. I have yet to find a function that works well across all three browsers. The load function I am currently using is similar to the one found in w3schools tutorials:

http://www.w3schools.com/XML/tryit.asp?filename=tryxml_dom_createelement

The code snippet looks like this:

if (window.ActiveXObject)
{
xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
}
// code for Mozilla, Firefox, Opera, etc.
else if (document.implementation.createDocument)
{
xmlDoc=document.implementation.createDocument("","",null);
}
else
{
alert('Your browser cannot handle this script');
}
xmlDoc.async=false;
xmlDoc.load(dname);

In Safari, this code results in a "TypeError: Value undefined (result of expression xmlDoc.load) is not object."

I also attempted the code from this site:

http://developer.apple.com/internet/webcontent/xmlhttpreq.html

However, it only returns a null XML file. Can anyone offer assistance?

Answer №1

It appears that Safari lacks support for document.implementation.createDocument for fetching and loading XML sources. Instead, you should utilize an XMLHttpRequest to retrieve and parse the XML.

I experimented with a modified version of the code from the Apple tutorial you provided, which worked adequately for me. While this code may not be flawless and lacks error handling, it served as a functional proof of concept at the moment.

Reminder: It is strongly recommended to use a library due to numerous browser inconsistencies associated with XMLHttpRequests and XML parsing. The investment will prove worthwhile!

In my non-library approach, I adapted the Safari code to obtain the XMLHttpRequest:

// function getXHR(url,callback) ...

Retrieving the XML from the response also poses its own set of challenges:

// function getXML( response ) ...

Subsequently, make use of the obtained data:

// function callback( response ) ...

If you encounter difficulties, consider these troubleshooting steps that can likely resolve your issue.

  1. Have you specified the content type as text/xml?
  2. Is your request successfully reaching the server and receiving a response?
  3. When examining the responseText, do you notice any anomalies?
  4. Ensure your XML is correctly formatted by validating it.

Wishing you the best of luck! Cheers.

Answer №2

If you're facing issues on Safari, consider checking out XML for <Script>. Users have reported finding solutions using it.

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