DNM Attribution: Browser console debug script — Displays dnm_src/dnm_cid cookie status, dataLayer push history, and test URL examples. Paste in console or append ?dnm_debug=1 to any page.

gist-dnm-debug.js

/**
 * DNM Attribution — Browser console debug script
 * File: dnm-debug.js
 *
 * Usage:
 *   1. Open browser console (F12 → Console)
 *   2. Paste this script and run it
 *   3. Or append ?dnm_debug=1 to any URL (purchase enrichment logs automatically)
 *
 * Test scenario URLs:
 *   Google Ads:  https://example.com/?gclid=Cj0KCQjwTest123
 *   Facebook:    https://example.com/?fbclid=Ab12TestFb&utm_source=facebook&utm_medium=paid_social&utm_campaign=TR_retargeting
 *   UTM manual:  https://example.com/?utm_source=newsletter&utm_medium=email&utm_campaign=april_campaign
 */

(function dnmDebug() {
  /* --- Cookie reader --------------------------------------------- */
  function getCookie(name) {
    var match = document.cookie.match(
      new RegExp("(?:^|; )" + name + "=([^;]*)"),
    );
    return match ? decodeURIComponent(match[1]) : null;
  }

  /* --- Display current cookies ----------------------------------- */
  var rawSrc = getCookie("dnm_src");
  var rawCid = getCookie("dnm_cid");

  console.group(
    "%c[DNM] Attribution cookie status",
    "color:#6c5ce7;font-weight:bold",
  );

  if (!rawSrc) {
    console.warn(
      "dnm_src cookie not found. Landing script has not run yet or cookie has been cleared.",
    );
  } else {
    var parts = rawSrc.split("|");
    console.log("%cdnm_src", "color:#00b894;font-weight:bold", rawSrc);
    console.table({
      source: parts[0] || "—",
      medium: parts[1] || "—",
      campaign: parts[2] || "—",
      content: parts[3] || "—",
      term: parts[4] || "—",
    });
  }

  if (!rawCid) {
    console.info("dnm_cid cookie not found (expected for non-paid traffic)");
  } else {
    var cidParts = rawCid.split(":");
    console.log("%cdnm_cid", "color:#0984e3;font-weight:bold", rawCid);
    console.table({
      type: cidParts[0] || "—",
      value: cidParts.slice(1).join(":") || "—", // safe parse in case value contains ':'
    });
  }

  console.groupEnd();

  /* --- Show recent dataLayer pushes ------------------------------ */
  var dl = window.dataLayer || [];
  var dnmEvents = dl.filter(function (e) {
    return (
      e.event === "dnm_source_captured" || e.event === "dnm_purchase_enriched"
    );
  });

  if (dnmEvents.length) {
    console.group(
      "%c[DNM] DataLayer push history",
      "color:#e17055;font-weight:bold",
    );
    dnmEvents.forEach(function (e) {
      console.log(e);
    });
    console.groupEnd();
  }

  /* --- Print test URLs ------------------------------------------- */
  console.group("%c[DNM] Test URL examples", "color:#fdcb6e;font-weight:bold");
  console.log(
    "Google Ads → " + window.location.origin + "/?gclid=TEST_GCLID_123",
  );
  console.log(
    "Facebook  → " +
      window.location.origin +
      "/?fbclid=TEST_FBCLID_456&utm_source=facebook&utm_medium=paid_social&utm_campaign=test",
  );
  console.log(
    "Email     → " +
      window.location.origin +
      "/?utm_source=newsletter&utm_medium=email&utm_campaign=april",
  );
  console.log("Debug mode → append ?dnm_debug=1 to any page");
  console.groupEnd();
})();