JSFiddle - React, Tailwind, and code Playground

HTML

<div id="20160106"></div>
<div id="20160105"></div>

JavaScript

var divID = [];
var sorted_arr=[];
$("div").each(function() {
    divID.push($(this).prop("id"));
     sorted_arr = divID.sort();
   
                 //divID.reverse();
})
 alert(sorted_arr);