List the hosts referenced on a HTML page (href, src), by decreasing occurrence count

HostsReferencedInPage.js

/**
 * List the hosts referenced on a HTML page.
 *
 * Licence: MIT.
 */

a = {};
document.querySelectorAll("a[href],[src]").forEach((v, k) => {
  const raw = v.getAttribute("href") || v.getAttribute("src");
  if (raw[0] !== "h") {
    return;
  }
  const u = new URL(raw);
  if (typeof a[u.host] == "undefined") {
    a[u.host] = 0;
  }
  a[u.host]++;
});
b = Array.from(Object.entries(a)).sort((x, y) => {
  if (x[1] < y[1]) {
    return 1;
  }
  if (x[1] > y[1]) {
    return -1;
  }
  if (x[0] < y[0]) {
    return -1;
  }
  if (x[0] > y[0]) {
    return 1;
  }
  return 0;
});
c = b.reduce((accu, curr) => {
  accu.push({ host: curr[0], count: curr[1] });
  return accu;
}, []);
console.table(c);