Fix plugin

docs/.vuepress/enhanceApp.js

+import plugin from "../../src/index.js"
+
+export default ({
+                    Vue, // the version of Vue being used in the VuePress app
+                    options, // the options for the root Vue instance
+                    router, // the router instance for the app
+                    siteData, // site metadata
+                    isServer // is this enhancement applied in server-rendering or client
+                }) => {
+    Vue.use(plugin);
+}

example/src/main.js

 import Vue from "vue";
 import App from "./App.vue";
 
+import plugin from "../../src/index.js";
+
 import "./assets/main.css";
 
+Vue.use(plugin);
+
 new Vue({
   render: (h) => h(App),
 }).$mount("#app");

src/index.js

@@ -7,10 +7,8 @@ Vue.use(VueInteractJs);
 const plugin = {
   install(Vue) {
     for (const prop in components) {
-      if (components.hasOwn(prop)) {
-        const component = components[prop];
-        Vue.component(component.name, component);
-      }
+      const component = components[prop];
+      Vue.component(component.name, component);
     }
   },
 };