JSFiddle - React, Tailwind, and code Playground

by mrroot5

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

JavaScript

function findBootstrapEnvironment() {
    var envs = ['xs', 'sm', 'md', 'lg'],
        $el = $('<div>'),
        i = 0,
        env;

    $el.appendTo($('body'));

    for (i = envs.length - 1; i >= 0; i--) {
        env = envs[i];

        $el.addClass('hidden-' + env);
        if ($el.is(':hidden')) {
            $el.remove();
            return env;
        }
    }
}

alert(findBootstrapEnvironment());