![]()
{
+ if (urlParams.has(param)) {
+ utmParams[param] = urlParams.get(param);
+ }
+ });
+
+ return utmParams;
+}
+
+// Store UTM params in sessionStorage
+function storeUtmParams(params) {
+ sessionStorage.setItem('utmParams', JSON.stringify(params));
+}
+
+// Get stored UTM params
+function getStoredUtmParams() {
+ const stored = sessionStorage.getItem('utmParams');
+ return stored ? JSON.parse(stored) : null;
+}
+
+// Add UTM params to a URL
+function addUtmToUrl(url, campaignType) {
+ try {
+ const urlObj = new URL(url);
+
+ // Don't modify external URLs
+ if (!urlObj.hostname.includes('elasticpath.dev')) {
+ return url;
+ }
+
+ // Get stored or default UTM params
+ const utmParams = getStoredUtmParams() || {...DEFAULT_UTM};
+
+ // Override campaign if specified
+ if (campaignType && CAMPAIGN_MAPPING[campaignType]) {
+ utmParams.utm_campaign = CAMPAIGN_MAPPING[campaignType];
+ }
+
+ // Add UTM params to URL
+ Object.entries(utmParams).forEach(([key, value]) => {
+ urlObj.searchParams.set(key, value);
+ });
+
+ return urlObj.toString();
+ } catch (e) {
+ // Return original URL if invalid
+ return url;
+ }
+}
+
+// Initialize UTM handling
+function initUtmHandler() {
+ // Store UTM params from URL if present
+ const urlUtmParams = getUrlUtmParams();
+ if (Object.keys(urlUtmParams).length > 0) {
+ storeUtmParams(urlUtmParams);
+ }
+
+ // Add click event listener to handle links
+ document.addEventListener('click', (e) => {
+ const link = e.target.closest('a');
+ if (link && link.href) {
+ // Get the campaign type from the data attribute
+ const campaignType = link.getAttribute('datautmcampaign');
+ const modifiedUrl = addUtmToUrl(link.href, campaignType);
+ if (modifiedUrl !== link.href) {
+ e.preventDefault();
+ window.location.href = modifiedUrl;
+ }
+ }
+ });
+}
+
+// Run when DOM is loaded
+if (document.readyState === 'loading') {
+ document.addEventListener('DOMContentLoaded', initUtmHandler);
+} else {
+ initUtmHandler();
+}
\ No newline at end of file