Function cleanNs

api/whois.js:26–30

(ns)

// Lower-case + dedupe nameservers, drop empty entries
const cleanNs = (ns) => {
  if (!Array.isArray(ns)) return undefined;
  const out = [...new Set(ns.map((n) => String(n).trim().toLowerCase()).filter(Boolean))];
  return out.length ? out : undefined;
};

// Convert a date string to ISO 8601 when parseable, otherwise return the raw value
const toIso = (raw) => {