Do not use built-ins: https://cli.vuejs.org/guide/browser-compatibility.html#polyfills-when-building-as-library-or-web-components

Author: David-Desmaisons

generator/template/babel.config.js

@@ -0,0 +1,7 @@
+module.exports = {
+  presets: [
+    ['@vue/app', {
+      "useBuiltIns": false
+    }]
+  ]
+}