window.addEventListener("omnisendForms", function(e) { if (e.detail.type === "submit") { // Read UTMs from sessionStorage const utms = { email: e.detail.fields?.emailField || "", name: e.detail.fields?.firstName || "", surname: e.detail.fields?.lastName || "", phone: e.detail.fields?.phoneNumberField || "", utm_source: sessionStorage.getItem("utm_source") || "", utm_medium: sessionStorage.getItem("utm_medium") || "", utm_campaign: sessionStorage.getItem("utm_campaign") || "", utm_content: sessionStorage.getItem("utm_content") || "", source: "omnisend_popup" }; // Fire to your Make webhook fetch("https://hook.eu1.make.com/wpaet9oajwc7jsd966z81hehrh70m25g", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(utms) }); } });