JSFiddle - React, Tailwind, and code Playground

HTML

<div class="div1">STUFF ONE</div>
<div class="div2">STUFF TWO</div>

JavaScript

var div1First = true;
if(div1First){
 var div2 = ($('.div2')).detach();
 ($('.div1')).append(div2);
}else{
 var div1 = ($('.div1')).detach();
 ($('.div2')).append(div1);
}