const app = document.getElementById('div');
//assign last child to variable
let app_lastChild = app.lastChild;
//assign text from last child of element
let lastChild_text = app.lastChild.text;
let text = document.getElementById("mySelect").lastChild.text; // text of last child
// lastChild returns the list child node: An element node, a text node, or a comment node
//The lastElementChild property returns the last child element (ignores text and comment nodes).
document.getElementById("myList").lastChild