JSFiddle - React, Tailwind, and code Playground

HTML

<p id="foo"></p>

JavaScript

var $frame = $('<iframe id="previewframe">');
$('#foo').html($frame);
setTimeout( function() {
    var doc = $frame[0].contentWindow.document;
    var $body = $('body',doc);
    $(doc).contents().find("head").append('<scr' + 'ipt type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"><\/scr' + 'ipt>');
    $body.html('<p>fddsf</p><scr' + 'ipt type="text/javascript">alert(jQuery);<\/scr' + 'ipt>');
}, 1 );