Nested routes not rendering in router-view - vue.js

Question

I'm setting up what is going to be a large system, so I want to have decentralised router.js files for every module. Each of them would have routes arrays declarations that would be pushed to the main routes array.
So for now I have a kind of root of routes file, which have the VueRouter instances and settings, and it imports the first level of route.js files to build the routes array.
main routes.js file
import DashboardRoutes from './views/dashboard/routes'
Vue.use(Router)
export default new Router({
mode: 'history',
base: process.env.BASE_URL,
routes: [
{// Root public site
path: '/',
component: () => import('./views/pages/Index'),
children: PagesRoutes
},
name: 'page_error',
path: '*',
component: () => import('./views/error/Error')
}
].concat(
DashboardRoutes
)
})
module (first level) routes.js file
import InventoryRoutes from './inventarios/routes'
const routes = {
path: '/panel',
component: () => import('./Index'), // This Index has a layout with a router-view in it
children: [
// Inicio del panel
{
name: 'dashboard',
path: '',
component: () => import('./Dashboard'),
}
].concat(
InventariosRoutes
)
}
export default routes
Components (second level) routes.js file
const routes = {
path: 'inventario',
name: 'panel_inventario',
component: { template: '<router-view/>' },
children: [
// Productos y servicios
{
name: 'panel_inventarios_productos-servicios',
path: 'productos-servicios',
component: () => import('./productos-servicios/ProductosServiciosHome'),
},
]
}
export default routes
In the components tree of vue-tools I see an AnnonymousComponent in the place where my children's router-view should be.
Update
I just create an external component to name it and check if it's being rendered like this
Components (second level) routes.js file
const loader = {
template: `
<div class="InventarioLoader">
<router-view></router-view>
</div>
`,
name: 'InventarioLoader'
}
const routes = {
path: 'inventario',
name: 'panel_inventario',
component: loader,
children: [
// children go here
]
}
Now I see my InventarioLoader component, but I still don't see my children components rendered in it
Update
I see this error on the console
You are using the runtime-only build of Vue where the template compiler is not available. Either pre-compile the templates into render functions, or use the compiler-included build.

Answer 1

You are using the runtime-only build of Vue where the template compiler is not available. Either pre-compile the templates into render functions, or use the compiler-included build.
By default, Vue does not compile string templates. This is for performance reasons.
Since the runtime-only builds are roughly 30% lighter-weight than their full-build counterparts, you should use it whenever you can
See https://v2.vuejs.org/v2/guide/installation.html#Runtime-Compiler-vs-Runtime-only
Either create a real single-file component or use a render function
import Vue from 'vue'
const RouterView = Vue.component('router-view')
const loader = {
name: 'InventarioLoader',
render (createElement) {
return createElement(RouterView)
}
}

Answer 2

Apparently now you can't point a route to a inline component like {template:'<router-view/>} and my solution was to create a loader component with that template and use it on the parent route