[Vuejs]-How can I keep the main content below the sidebar when the sidebar opens?

It is intended that v-content resizes based on the size of navigation drawers and other app components with the ‘app’ property.

If you don’t want this, don’t use the ‘app’ prop. Instead, depending on your desired effect, you may have to position the navigation drawer (sidebar) yourself. You can easily do this by adding props like ‘absolute’ or ‘temporary’, or by placing the drawer in a container component such as v-menu. You can use the examples provided by Vuetify as an example.