I can achieve smooth-scroll router-links with:

  <router-link :to="{ hash: 'home' }">Home</router-link>
  <router-link :to="{ hash: 'about' }">About</router-link>

and router.js:

import Vue from "vue";
import VueRouter from "vue-router";

import Home from "../vue/home";
import About from "../vue/about";

Vue.use(VueRouter);

export default new VueRouter ({
    mode: "history",
    routes: [
        {path: "/", name: "home", component: Home},
        {path: "/about", name: "about", component: About},
    ],
    scrollBehavior(to, from,  savedPosition) {
        return {
            selector: to.hash,
            behavior: 'smooth'
        }
    }
});

The smooth-scroll effect is a bit slow compared to vue's v-smooth-scroll class. Is there any way to control the smooth-scroll speed of VueRouter?