JSFiddle - React, Tailwind, and code Playground
HTML
<span>my span</span>
JavaScript
var mySpan = $('span');
alert(mySpan[0].outerHTML);
alert($('<div/>').append(mySpan.clone()).html()); // Old FF
<span>my span</span>
var mySpan = $('span');
alert(mySpan[0].outerHTML);
alert($('<div/>').append(mySpan.clone()).html()); // Old FF