I am developing a web application that uses vue-router for SPA with the Laravel 5 backend. It uses files .vuefor application components that are run through laravel-elixir-vueifyto create the necessary JavaScript.
I installed vue-router with Vue successfully and can load the components defined in the same file as the main Vue and Vue router instances.
The problem occurs when I try and require the component that is contained in the file .vue. Although the browser / vueify reports a successful launch when I check the Vue instance, it only has anonymous component snippets shown in the instance by Vue dev tools, and no markup placed inside router-view.

There are no errors in the console, although it seems that external components do not load correctly.
Examples of various codes and files are as follows:
gulpfile.js
...
mix.browserify('dashboard.js');
...
dashboardOverview.vue
<template>
<div>
<h1>Overview</h1>
<img src="//placehold.it/320x100" style="width: 100%; margin-bottom: 15px" alt="Pathway Visualisation" />
</div>
</template>
<script>
export default {}
</script>
Where dashboardOverview.vueis at resources\assets\js\components\dashboardOverview.vue.
Main view
@section('content')
<div id="app">
<h1>Welcome</h1>
<a v-link="{ path: '/activate' }">Activate</a>|
<a v-link="{ path: '/' }">Overview</a>
<router-view></router-view>
</div>
@endsection
This is complemented by the following JavaScript:
var Vue = require('vue');
var VueRouter = require('vue-router');
Vue.use(VueRouter)
var dashboardOverview = require('./components/dashboardOverview.vue');
var userSetup = require('./components/userSetup.vue');
var App = Vue.extend();
var router = new VueRouter()
Vue.config.debug = true
router.map({
'*': {
component: Vue.extend({template: '<h4>404 Not found</h4>'})
},
'/': {
component: dashboardOverview
},
'/activate': {
component: userSetup
}
})
router.start(App, '#app')
Where dashboard.jsis at resources\assets\js\dashboard.js.