Segment DOM link types

custom-metric-anchor-nodes.js

var nodes = document.getElementsByTagName("a");
var link = document.createElement("a");

var internal = 0;
var external = 0;
var hash = 0;
var navigateHash = 0;
var issue = 0;

if (nodes) {
    for (var i = 0, len = nodes.length; i < len; i++) {
        var node = nodes[i];

        // our local parser trick
        if (node.href) {
            link.href = node.href;

            if (document.location.hostname === link.hostname) {
                internal++;
                if (document.location.pathname === link.pathname && link.hash.length > 0) {
                    
                    // check if hash matches an element in the DOM (scroll to)
                    var element = document.querySelector(link.hash);
                    if (element) {
                        hash++;
                    } else {
                        navigateHash++;
                    }
                }
            } else if (document.location.hostname !== link.hostname) {
                external++;
            } else {
                issue++;
            }
        }
    }
}

console.log({ internal, external, hash, navigateHash, issue });