Difficulty encountered while trying to register NavBar component within App.vue

I'm currently working on setting up a navigation bar that spans my entire Vue application. Transitioning from React, I've been attempting to import my Navigation Component into main.ts and use it above the router outlet in App.vue. The application was initially created with vue-cli using TypeScript and Router.

So far, I've experimented with creating the navigation component using Vue.extend, @Component, and export default {*/ options */}.

I've also tried including a script tag within App.vue where I could register the Navigation component.

In addition, I have imported and registered the Navigation component in main.ts.

Navigation.ts:

import Vue from 'vue';
import { Component } from 'vue-property-decorator';
import { store } from '@/store';

@Component({
    name: 'nav-component',
})
export default class Navigation extends Vue {}

Navigation.vue:

<template>
    <nav class="nav-header" >
        <div>
            <button class="switch-map">MAP</button>
        </div>
    </nav>
</template>

<script src='./Navigation.component.ts' ></script>
<style lang="scss" scoped src='./Navigation.scss' ></style>

main.ts:

import Vue from "vue";
import App from "./App.vue";
import router from "./router";
// various imports
import NavigationComponent from 
'@/components/Navigation/Navigation.component';

Vue.config.productionTip = false;

new Vue({
  components: {
    'nav-component': NavigationComponent
  },
  data: {

  },
  store: store,
  router,
  render: h => h(App)
 }).$mount("#app");

App.vue:

<template>
  <div id="app">
    <nav-component></nav-component>
    <router-view/>
  </div>
</template>

Expected outcome: A consistent navigation bar at the top of the application across all pages (currently only two routes).

Actual issue: encountering an 'unknown custom element' error. Have I registered it correctly? For recursive components, make sure to include the 'name' option.

I have encountered the 'Failed to mount component: template or render function not defined' error message with other attempted solutions. Any helpful suggestions would be greatly appreciated!

Answer №1

nav-component in App.vue seems to be missing a declaration in the components section. It appears you have placed the declaration in main.ts, but it should actually be moved to App.vue, where the component is being used.

App.vue:

<script>
import NavigationComponent from '@/components/Navigation/Navigation.component';

export default {
  name: 'app',
  components: {
    'nav-component': NavigationComponent
  }
}
</script>

Furthermore, ensure that the <script> tag in Navigation.vue includes lang="ts".

Answer №2

  1. According to tony19, the `nav-component` in `App.vue` has not been registered.
  2. The components that have been registered locally are located in `main.ts':
// The components created by `new Vue` are local.
// *mainInstance including `nav-component`, but App isn't including it.
const mainInstance = new Vue({
  components: {
    'nav-component': NavigationComponent
  }
  // This is just a rendering component, so App cannot access the current injected components.
  render: h => h(App)
});

If you wish to create global components, you can do so like this:

Vue.component('nav-component', NavigationComponent);

Answer №3

Looks like you're trying to import Navigation.component

import NavigationComponent from '@/components/Navigation/Navigation.component';

However, what you actually need to import is Navigation.vue here.

import NavigationComponent from '@/components/Navigation/Navigation.vue';

Answer №4

Include the navigation component in App.vue as shown below:

import NavigationComponent from 
'@/components/Navigation/Navigation.vue';

You do not need to import it in main.ts. By importing it in App.vue and using it this way, the navigation component will be available throughout your application.

<template>
  <div id="app">
    <navigation-component></navigation-component>
    <router-view/>
  </div>
</template>

Don't forget to register it as a component in the script tag of App.vue like this:

 components: {NavigationComponent}

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