how to click menu bar then expand & collapse in oracle apex

$("#t_TreeNav").on("treeviewactivatenode", function(e, ui) {
var n$ = $(e.originalEvent.target).closest(".a-TreeView-content");
if (ui.nodes.length > 0 && ui.nodes[0].link === "") {
if (n$.parent().hasClass("is-expandable")) {
$(this).treeView("expand", n$)
} else if (n$.parent().hasClass("is-collapsible")) {
$(this).treeView("collapse", n$)
}
}
});