JavaScript – getElementsByTagName causes NullPointerException

Consider the following codes:

Ti.API.info(doc.getElementsByTagName('mytag'));
Ti.API.info(doc.getElementsByTagName('mytag').item(0));

XML is valid and consists of a valid element "mytag". The result of the first line is as expected:

[INFO] [...] [Ti.NodeList]

The second line throws a

Wrapping java.lang.nullpointerexception

This makes me confused because that line is good for IOS. Does anyone have an Iidea that may lead to errors?

resolvent:

I solved it with it

if (doc.getElementsByTagName("mytag").length>0) {..}

Thank you for your advice:)

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