<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>GopherJS mouseenter/mouseleave Demo</title>
<style>#demo{background-color: yellow; width: 10em; height: 10em;}</style>
</head>
<body>
<div id="demo"></div>
<div id="info">move your mouse enter and then leave the yellow area.</div>
<script src="app.js"></script>
</body>
</html>