diff --git a/src/mailgo.script.js b/src/mailgo.script.js
index efbd2dc..44581af 100644
--- a/src/mailgo.script.js
+++ b/src/mailgo.script.js
@@ -1,3 +1,5 @@
+// import mailgo
 import mailgo from "../mailgo";
 
+// call init mailgo attached to the event DOMContentLoaded
 mailgo({ initEvent: "DOMContentLoaded" });
diff --git a/src/mailgo.ts b/src/mailgo.ts
index 7f462dd..d47d937 100644
--- a/src/mailgo.ts
+++ b/src/mailgo.ts
@@ -822,15 +822,15 @@ const mailgoStyle = () => {
   document.head.appendChild(mailgoCSS);
 };
 
-// export default for mailgo
-export default (mailgoConfig?: any) => {
+// mailgo
+const mailgo = (mailgoConfig?: any) => {
   // if the window is defined...
   if (window && typeof window !== "undefined") {
     // add the style for mailgo
     mailgoStyle();
 
     // if is set an initEvent add the listener
-    if (mailgoConfig.initEvent) {
+    if (mailgoConfig?.initEvent) {
       document.addEventListener(mailgoConfig.initEvent, mailgoInit);
     } else {
       mailgoInit();
@@ -840,3 +840,5 @@ export default (mailgoConfig?: any) => {
     document.addEventListener("click", mailgoCheckRender);
   }
 };
+
+export default mailgo;