Node name in JavaScript

All nodes have the property nodeName. For a comment, it contains the value 'comment', for a text node, the value 'text', and for an element node, the tag name in uppercase. It turns out that nodeName for elements is similar to the property tagName, but works for other types of nodes as well.

Given a div:

<div id="elem">txt<b>tag</b><!--com-->txt<b>tag</b><!--com--></div>

Loop through all the nodes of this div and print their names to the console.

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