javascript xml parser undefined check

Question

Im parsing an xml file with javascript like this :

x = xmlDoc.getElementsByTagName("Name")[0].childNodes[0];

Everything works as expected, except that some times when i dont have an entry "Name" in the xml it shows this error :

xmlDoc.getElementsByTagName("Name")[0] is undefined

which crash my website. Is there any way to check if xmlDoc.getElementsByTagName("Name")[0] has a value and then continue to parse this value to a variable?

Talha · Accepted Answer · 2012-06-12 07:06:59Z

1

use

if(xmlDoc.getElementsByTagName("Name") != 'undefined' && xmlDoc.getElementsByTagName("Name")[0] != 'undefined'){
// your code
}

answered Jun 12, 2012 at 7:06

Talha

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sandeep patel · Accepted Answer · 2012-06-12 07:10:33Z

1

check this code:-

if (typeof(xmlDoc.getElementsByTagName("Name")[0]) != "undefined" && xmlDoc.getElementsByTagName("Name")[0] != null){

//ur code
}

answered Jun 12, 2012 at 7:10

sandeep patel

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Comments

Sarfraz · Accepted Answer · 2012-06-12 07:06:01Z

0

Use typeof like this:

if (typeof xmlDoc.getElementsByTagName("Name")[0] !== 'undefined') {
  // not undefined
}

answered Jun 12, 2012 at 7:06

Sarfraz

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