Draw an empty rectangle which is always invisible but never hidden (unless the whole node is hidden). This is needed so that other elements can be set to `display = none` but still calculate the scroll height properly. `display = none` is even more performant than just setting an element's opacity to zero.
Draw an empty rectangle which is always invisible but never hidden (unless the whole node is hidden). This is needed so that other elements can be set to `display = none` but still calculate the scroll height properly. `display = none` is even more performant than just setting an element's opacity to zero.

flekschas/d3-list-graph,flekschas/d3-list-graph