JSFiddle - React, Tailwind, and code Playground

HTML

<div id="addrun"></div>
<div id="runwell1"> <span id="tag1">Clone div</span>

</div>

JavaScript

var runNum = 1;
var s = $('#runwell' + runNum).clone().attr('id', '#runwell' + (++runNum)).wrap('<div>');
s.find('#tag' + runNum).attr('id', 'tag' + (++runNum));
$('#addrun').before(s);