JSFiddle - React, Tailwind, and code Playground

HTML

<!--
foo3
-->
<div>
<!--
foo1
-->
bar
<!--
foo2
-->
</div>

JavaScript

var div = document.getElementsByTagName('div')[0];

var nodes = div.childNodes;

for (var i=0; i<nodes.length; i++){
    if (nodes[i].nodeType === 8) {
        //Only comments go out to console.
        console.log(nodes[i]);
    }1
}