[Vuejs]-Resolve to child route of current route

The use of <router-link> is preferred over using <a> tag for the reasons given in the docs, and in addition has a simple built-in method of appending to the current path when navigating

<router-link :to="{ path: 'new' }" append>go to new</router-link>

This will route you from /featureX to /featureX/new