changed js file extensions

src/themes/theme-fipamo-default/com/Base.js

@@ -0,0 +1,18 @@
+export default class Base {
+	//--------------------------
+	// constructor
+	//--------------------------
+	constructor() {
+		this.start();
+	}
+	start() {
+		console.log('Connected like F.E.');
+	}
+	//--------------------------
+	// methods
+	//--------------------------
+
+	//--------------------------
+	// event handlers
+	//--------------------------
+}

src/themes/theme-fipamo-default/com/Start.js

@@ -0,0 +1,9 @@
+import Base from "./Base.js";
+
+document.addEventListener(
+  "DOMContentLoaded",
+  function () {
+    var base = new Base();
+  },
+  false
+);