问Vue单文件组件中的插件

EN

var MyCoolVuePlugin = {
    install(Vue) {
        Vue.prototype.doStuff = function() {
            console.log("I'm a useless plugin")
        }
    }
}

export default MyCoolVuePlugin;

import Vue from 'vue';
import App from './App';
import MyCoolVuePlugin from './plugin';

Vue.use(MyCoolVuePlugin);

window.vApp = new Vue({
  el: '#app',
  router: Router,
  components: { App },
  template: '<App/>'
});

<template>
  <div id="app">
    <h1>Is Anybody There</h1>
    <some-other-component />
  </div>
</template>

<script>
import SomeOtherComponent from "./components/SomeOtherComponent";

export default {
    name: "App",
    components: {
        "some-other-component": SomeOtherComponent
    },
    data() {
        ...
    },
    mounted() {
        // How do I access my Vue plugin
        // I can do:
        vApp.doStuff();
        // Or I can do:
        this.$parent.doStuff();
    }
};
</script>

<style lang="scss">
...
</style>