accessing value of XML file in javascript

Question

I load an XML document using XMLHTTPRequest in my js file as below:

<?xml version="1.0" encoding="utf-8"?>
<RMFSFile xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<Host>www.example.com</Host>
<Port>8888</Port>   
<Uri>www.example.com</Uri>
<Path>
    <HD>
        <UNC>path1</UNC>
    </HD>
    <SD>
        <UNC>path2</UNC>
    </SD>
</Path>

I am trying to SELECT the value of "UNC" for HD using javascript.

I have tried something like below, which didn't work:

      var x = xml.getElementsByTagName('Path')[0];
      var y = x.getElementsByTagName('HD');
      var z = y.getElementsByTagName('UNC');

Any idea How Can I retrieve the Path?

getElementsByTagName returns a collection - as you seem to realise with var x and forget in the very next line of code! — Jaromanda X
– Jaromanda X, Commented Nov 30, 2015 at 9:42

Jaromanda X · Accepted Answer · 2015-11-30 09:52:56Z

2

You're using getElementsByTagName correctly in the first line, then incorrectly after that

It should be

  var x = xml.getElementsByTagName('Path')[0];
  var y = x.getElementsByTagName('HD')[0];
  var z = y.getElementsByTagName('UNC')[0];

or, more simply (if you know there will only ever be one)

var z = xml.querySelector('Path>HD>UNC');

or, to get the first of "many"

var z = xml.querySelectorAll('Path>HD>UNC')[0];

I've ignored the fact that your XML is invalid, by the way, I figure that's a missed line when posting here

answered Nov 30, 2015 at 9:52

Jaromanda X

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2 Comments

Benjamin Over a year ago

I wasn't aware about querySelector. it is much simple than trying to use GetElements.

Jaromanda X Over a year ago

beware, it may not be universally available - though it has been in internet explorer since IE8, so, pretty safe to use (I know I know, there's still a big percentage of IE7 out there)

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