The Vue.js Vuetify.js error message is saying "A mystery custom element: <v-list-item>, <v-list-item-title> - Have you properly registered the component?"

I followed the instructions from Vuetify Data Iterator Filter section

I am able to use various Vuetify components like v-btn, v-card, v-data-table, v-data-iterator, and more.

However, I encountered errors only with <v-list-item> and <v-list-item-title>.

I'm puzzled about the root cause of these issues.

Here are the error messages I received:

[Vue warn]: Unknown custom element: <v-list-item> - have you properly registered the component? For recursive components, ensure to provide the "name" option

[Vue warn]: Unknown custom element: <v-list-item-title> - have you correctly registered the component? For recursive components, make sure to provide the "name" option.

Snippet of HTML code:

<template>
  <div class="container">
    <v-container fluid grid-list-md style="padding: 0">
      <v-data-iterator
        :items="items"
        :items-per-page.sync="itemsPerPage"
        :page="page"
        :search="search"
        :sort-by="sortBy.toLowerCase()"
        :sort-desc="sortDesc"
        hide-default-footer
      >
       <!-- More code here -->
      </v-data-iterator>
    </v-container>
  </div>
</template>

JS excerpt:

export default {
  data() {
    return {
      // Data properties
    };
  },
  computed: {
    // Computed properties
  },
  methods: {
    // Methods
  },
};

Output screenshot demonstrates successful implementation of other components.

Please refer to the https://i.sstatic.net/KzFzr.png


To rule out any installment issues, I revisited the Vuetify Quick Start guide and double-checked my Vuetify setup.

Below is the content in src\plugins\vuetify.js file

import Vue from 'vue'
import Vuetify from 'vuetify/lib'
import 'vuetify/src/stylus/app.styl'

Vue.use(Vuetify, {
  iconfont: 'md',
})

as well as in src\main.js

import Vue from "vue";
import firebase from './components/firebaseInit';
import App from "./App.vue";
import router from "./router";
import vuetify from './plugins/vuetify' // path to vuetify export

Vue.config.productionTip = false;

let app = '';

// Verify Firebase initialization before launching the Vue app
firebase.auth().onAuthStateChanged(() => {
  if (!app) {
    app = new Vue({
      vuetify,
      router,
      render: h => h(App)
    }).$mount("#app");    
  }
});

Despite attempting manual import of components, the same errors persisted:

import { VListItem, VListItemTitle } from "vuetify/lib";

export default {
  components: {
    'v-list-item': VListItem,
    'v-list-item-title': VListItemTitle
  },
...
}

I also performed the following troubleshooting steps:

  1. Delete .node_modules directory
  2. Execute npm update
  3. Run npm install

Nevertheless, the issues remained unresolved. Extensive research yielded no solution to this predicament.

Answer №1

It turned out that I was using "vuetify": "^1.5.16" when VListItem was actually introduced in version 2.0.

Updating Vuetify to the latest version and installing webpack solved the problem.

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