Select xml node by attribute in javascript

Question

I need to read an xml node in javascript, just if a certain attr has a specific value. Is there any way without using a loop? I mean something like:

x = xml.getElementsByTagName("someXmlTag")[someAttr=someValue];

does your environment support xpath? (i.e, is there an evaluate method on xml ... if this is in firefox at least and xml is an xml document, it seems you could use xml.querySelector('someXmlTag[someAttr=someValue]'); — Jaromanda X
– Jaromanda X, Commented Aug 12, 2015 at 14:28
I think so. I'm trying something like var matches = xml.querySelectorAll('Tracking[event=viewable_impression]') but still no results. This returns a nodelist object, and I need the value. — graham o'donnel
– graham o'donnel, Commented Aug 12, 2015 at 14:47
iterate through the nodelist ... if you only want the FIRST match (or there is only one) see the answer vvvv below - i.e. use querySelector not querySelectorAll — Jaromanda X
– Jaromanda X, Commented Aug 12, 2015 at 14:52

Jaromanda X · Accepted Answer · 2015-08-12 14:43:35Z

2

This works in firefox

var x = xml.querySelector('someXmlTag[someAttr=someValue]');

YMMV with other browsers

answered Aug 12, 2015 at 14:43

Jaromanda X

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