mensa/src/router/index.js

import Vue from 'vue'
import Router from 'vue-router'
import Hello from '@/components/Hello'
import Mensa from '@/components/Mensa'
import Tag from '@/components/Tag'

Vue.use(Router)

export default new Router({
  mode: 'history',
  routes: [
    {
      path: '/',
      name: 'Hello',
      component: Hello
    },
    {
      path: '/:mensa',
      name: 'Mensa',
      component: Mensa,
      children: [{
        path: ':tag',
        component: Tag
      }]
    }
  ]
})