cookie

public/setCookie.js

@@ -0,0 +1,36 @@
+function setUtmCookies() {
+  // Helper: get query param from URL
+  function getQueryParam(param) {
+    const urlParams = new URLSearchParams(window.location.search);
+    return urlParams.get(param);
+  }
+
+  // Helper: get cookie by name
+  function getCookie(name) {
+    const match = document.cookie.match(new RegExp('(^| )' + name + '=([^;]+)'));
+    return match ? decodeURIComponent(match[2]) : null;
+  }
+
+  // Helper: set cookie if not already set
+  function setCookieIfEmpty(name, value, days = 90) {
+    if (!value) return;
+    if (getCookie(name)) return; // Don't overwrite existing cookie
+    const date = new Date();
+    date.setTime(date.getTime() + days * 24 * 60 * 60 * 1000);
+    document.cookie = `${name}=${encodeURIComponent(value)}; expires=${date.toUTCString()}; path=/; SameSite=Lax`;
+  }
+
+  // Get UTM params
+  const utmSource = getQueryParam('utm_source');
+  const utmMedium = getQueryParam('utm_medium');
+  const utmCampaign = getQueryParam('utm_campaign');
+
+  // Set cookies only if not already present
+  setCookieIfEmpty('utm_source', utmSource, 90);
+  setCookieIfEmpty('utm_medium', utmMedium, 90);
+  setCookieIfEmpty('utm_campaign', utmCampaign, 90);
+}
+
+// Run on page load
+setUtmCookies();
+