return of App.tsx

src/App.tsx

@@ -0,0 +1,16 @@
+/* -------------------------------------------------------------------------- */
+/*                                  Libraries                                 */
+/* -------------------------------------------------------------------------- */
+import React from "react";
+/* -------------------------------------------------------------------------- */
+/*                         Application root component                         */
+/* -------------------------------------------------------------------------- */
+/**
+ * Application root component
+ * @return {JSX.Element}
+ */
+function App() {
+  return <div>Hello world!</div>;
+}
+
+export default App;