JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://imakewebthings.github.com/jquery-waypoints/waypoints.min.js"></script>
<div class="first"></div>
<div class="second"></div>

CSS

.first {
    background:green;
    height: 600px;
    width:100%;
}
.second {
    background:red;
    height: 600px;
    width:100%;
}

JavaScript

$('.second').waypoint(function() {
    alert('You have scrolled to an entry.');
}, {
    offset: '100%'
});