JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http:////netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css">
<a class="btn" id="expander">Click to slideDown/slideUp</a>

<div class="well hide">
    <h1>Here is the hidden text</h1>
</div>

CSS

.well {
    min-height: 0px;
}

JavaScript

var hidden = false;

$(document).on("click", "#expander", function() {
    if (hidden) {
        $(".well").slideUp();
    }
    else {
        $(".well").slideDown();
    }
    hidden = !hidden;
});