<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
body {
background-color: #ffffff;
}
div {
width: 50%;
}
</style>
</head>
<body>
<iframe src="/snippets/css.html" id="target"></iframe>
<script>
var div = document.getElementById("target");
div.onload = function() {
div.style.height = div.contentWindow.document.body.scrollHeight + 'px';
}
</script>
</body>
</html>