const router = new VueRouter({
  routes: [
    {
      path: '/user/:userId',
      name: 'user',
      component: User
    }
  ]
})

<router-link :to="{ name: 'user', params: { userId: 123 }}">Пользователь</router-link>

const router = new VueRouter({
  routes: [
    {
      path: '/user/randomstring/long/path/:userId',
      name: 'user',
      component: User
    }
  ]
})

countData(param) {
    let tmp = oneMethod(param) + twoMethod(param)
    return +tmp.toFixed(2)
 },