Meta Pixel 実装事例
LP + サンクスページの広告計測を、検証込みで納品

<!-- Meta Pixel Code -->
<script>
  !(function (f, b, e, v, n, t, s) {
    if (f.fbq) return;
    n = f.fbq = function () {
      n.callMethod
        ? n.callMethod.apply(n, arguments)
        : n.queue.push(arguments);
    };
    if (!f._fbq) f._fbq = n;
    n.push = n;
    n.loaded = !0;
    n.version = "2.0";
    n.queue = [];
    t = b.createElement(e);
    t.async = !0;
    t.src = v;
    s = b.getElementsByTagName(e)[0];
    s.parentNode.insertBefore(t, s);
  })(
    window,
    document,
    "script",
    "https://connect.facebook.net/en_US/fbevents.js",
  );
  fbq("init", "YOUR_PIXEL_ID_HERE");
  fbq("track", "PageView");
</script>
<noscript
  ><img
    height="1"
    width="1"
    style="display: none"
    src="https://www.facebook.com/tr?id=YOUR_PIXEL_ID_HERE&ev=PageView&noscript=1"
    alt=""
/></noscript>
<!-- End Meta Pixel Code -->

var EMAIL_RE = /^[^\s@]+@[^\s@]+\.[^\s@]{2,}$/;

function initLeadForm() {
  var form = document.getElementById("lead-form");
  if (!form) return;

  var input = document.getElementById("email");
  var error = document.getElementById("email-error");

  form.addEventListener("submit", function (event) {
    event.preventDefault();

    var value = input ? input.value.trim() : "";
    var valid = EMAIL_RE.test(value);

    if (!valid) {
      if (input) input.classList.add("is-invalid");
      if (error) error.hidden = false;
      if (input) input.focus();
      return;
    }

    if (input) input.classList.remove("is-invalid");
    if (error) error.hidden = true;

    /* バリデーション通過時のみ Lead を発火 */
    if (typeof window.fbq === "function") {
      window.fbq("track", "Lead");
    }

    /* ビーコン送信の猶予を確保してから遷移 (二重遷移ガード付き) */
    var navigated = false;
    var go = function () {
      if (navigated) return;
      navigated = true;
      window.location.href = "thanks.html";
    };
    window.setTimeout(go, 300);
  });

  if (input) {
    input.addEventListener("input", function () {
      input.classList.remove("is-invalid");
      if (error) error.hidden = true;
    });
  }
}

fbq("init", "YOUR_PIXEL_ID_HERE");
fbq("track", "PageView");
fbq("track", "CompleteRegistration");