lastElementChild property
      
      Element?
      get
      lastElementChild
      
    
    
The Element.lastElementChild read-only property
returns an element's last child Element, or null if there
are no child elements.
Element.lastElementChild includes only element nodes.
To get all child nodes, including non-element nodes like text and comment
nodes, use Node.lastChild.
Implementation
external Element? get lastElementChild;