Активно-классный маршрутизатор
//when a route is active we can use this to add a certain style to the element:
<router-link to="/[route-name]" active-link="active'> <router-link>
//when the route is active, active-link will add the class active to the element
//you can define then a certain style for elements that contain the class active
Grieving Gharial