1👍
✅
This question was answered by Estus Flask in the comments section.
app.js
import { createApp } from "vue";
import App from "./app.vue";
let app = createApp(App)
let vm = app.mount("#app"); //This return instance is the proxy to the VueJs component
window.vm = vm;
2👍
In Vue 3, to access the internal methods of a component, you should consider using defineExpose
to expose the method in that component
Source:stackexchange.com