clone node javascript

 // Get the last <li> element ("Milk") of <ul> with id="myList2"
var itm = document.getElementById("myList2").lastChild;

 
// Copy the <li> element and its child nodes
var cln = itm.cloneNode(true);

// Append the cloned <li> element to <ul> with id="myList1"
document.getElementById("myList1").appendChild(cln); 

// Syntax:
let newClone = node.cloneNode([deep])

// Example:
let p = document.getElementById("para1")
let p_prime = p.cloneNode(true)