Source code
Revision control
Copy as Markdown
Other Tools
<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Reference Case</title>
<style>
.container {
height: 200px;
}
iframe {
box-sizing: border-box;
height: 200px;
width: 40px;
border: 5px solid blue;
margin: 0;
background: cyan;
}
</style>
<body>
<div class="container">
<div style="height: 0"></div>
<iframe></iframe>
</div>
</body>