T3JS

Framework JS

HTML

<script src="https://cdn.rawgit.com/box/t3js/v1.1.0/dist/t3.min.js"></script>
<div data-module="header">
    <h1>Box</h1>
    <button id="welcome">Show Welcome</button>
</div>

CSS

#clear-completed {
	display: none;
}
.has-completed-tasks #clear-completed {
	display: block;
}

JavaScript

window.onload = function(){
    Box.Application.init({
        debug: true;
    })

};