SOURCE

const User = {
	template: '<div>User {{$route.params.id}}</div>',
	watch: {
		'$route'(to, from) {
			console.log(to)
		}
	}
}

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

const App = new Vue({
	router
}).$mount('#app')

<div id='app'>
	<p>
		<router-link to='/user/foo'>/user/foo</router-link>
		<router-link to='/user/bar'>/user/bar</router-link>
	</p>
	<router-view></router-view>
</div>