JSFiddle - React, Tailwind, and code Playground

HTML

<p class="alert alert-success">
aaaaaa
</p>

JavaScript

var link = document.createElement('link');
link.setAttribute("rel", "stylesheet");
link.setAttribute("type", "text/css");
link.onload = function(){ console.log('loaded'); }
link.setAttribute("href", 'https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css');
document.getElementsByTagName("head")[0].appendChild(link);