Is there a way for a component to render independently of App.vue?

Iā€™m exploring the use of vue-cli for my app, and I'm curious if it's possible to utilize a component without relying on App.vue. In this scenario, the component is displayed in the html, but when I click the button labeled "click here", the testFunction within the component is not triggered.

index.html

<!DOCTYPE html>

<html lang="">

  <head>

    <meta charset="utf-8">

    <meta http-equiv="X-UA-Compatible" content="IE=edge">

    <meta name="viewport" content="width=device-width,initial-scale=1.0">

    

  </head>

  <body>

   <h1>hi</h1>

    <div id="app">

      <MyComponent @my-event="testFunction"></MyComponent>

    

    </div>

    <!-- built files will be auto injected -->

    

  </body>

  <script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="daacafbf9ae8f4ecf4ebeb">[email protected]</a>" defer></script>

  <script  src="main.js" defer></script>

</html>

MyComponent.vue

    <div class="child" @click="$emit('my-event')">

click here

     </div>

 </template>

 

 <script>

export default {

  name: 'MyComponent',

  props: {

  }

}

</script>

main.js

import Vue from 'vue/dist/vue.js'

import MyComponent from './components/MyComponent'

Vue.config.productionTip = false

Vue.component('MyComponent',MyComponent);

new Vue({

  el: '#app',

  beforeCreate() {

    console.log('Vue instance beforeCreate!');

  },

  created() {

      console.log('Vue instance created!');

  },

  

  mounted() {

    fetch('https://jsonplaceholder.typicode.com/todos')

    .then(response => response.json())

    .then(json => this.todos=json);

  },

  

  components: {

   MyComponent

  },

    

  data: {

      todos:null,

      data:null

  },

  

   methods: {

       testFunction:function(){

         console.log("clicked");

       }

    },

  

  render:h => h(MyComponent),

}).$mount('#app')

My Question:

  1. In this setup, the testFunction in MyComponent isn't being called even though MyComponent is emitting an event, and App.vue is not used.
  2. Is there a way to register a component without using render:h => h(myComponent) and $mount("#app")?

    3.There is an [Vue warn]: Cannot find element: #app error appearing in the console

Answer ā„–1

Unfortunately, the default configuration of vue-cli does not allow for what you are requesting. However, it is possible to import a component globally or into a specific module. For more information on local and global imports, you can refer to this link.

If you're looking for a workaround, one option is to create a separate div to mount the application and use the MyComponent as the base component for that div. Keep in mind that sharing data directly between two Vue applications will not be possible with this approach. In the past, this behavior was limited to modal insertion, but nowadays teleporting elements is the preferred method. You can learn more about teleporting elements here.

// main.js
import { createApp } from 'vue';

import App from './App.vue';
import MyComponent from './components/MyComponent.vue';


createApp(App).mount('#app');
createApp(MyComponent).mount('#app2');
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <link rel="icon" href="<%= BASE_URL %>favicon.ico">
    <title><%= htmlWebpackPlugin.options.title %></title>
  </head>
  <body>
    <noscript>
      <strong>We're sorry but <%= htmlWebpackPlugin.options.title %> doesn't work properly without JavaScript enabled. Please enable it to continue.</strong>
    </noscript>
    <div id="app"></div>
    <div id="app2"></div>
    <!-- built files will be auto injected -->
  </body>
</html>

Answer ā„–2

One potential solution could involve utilizing App.vue with customized options as shown below:

<template>
  <div class="container">

    <div >
      <div id="AdminTemplate" v-if="this.$route.meta.layout == 'AdminTemplate'">
        <router-view />
      </div>
    <div id="NormalTemplate" v-else>
        <router-view />
    </div>
  
  </div>

</template>
<script>
export default {
  data() {
    return {
      
    };
  },
};
</script>

Additionally, include the following in the router setup:

{
    path: "/admin",
    name: "AdminVue",
    component: AdminVue,
    meta: { layout: 'AdminTemplate' },
  }

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