Is it possible to get reference to comment element/block by JavaScript?

by 
var findComments = function(el) {
    var arr = [];
    for(var i = 0; i < el.childNodes.length; i++) {
        var node = el.childNodes[i];
        if(node.nodeType === 8) {
            arr.push(node);
        } else {
            arr.push.apply(arr, findComments(node));
        }
    }
    return arr;
};

var commentNodes = findComments(document);

// whatever you were going to do with the comment...
console.log(commentNodes[0].nodeValue);

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