<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Containment Reference: Size containment replaced elements intrinsic size</title>
<style>
  body > div, video, audio, img, canvas, svg, iframe {
    border: 3px solid orange;
    contain: size;
    margin-bottom: 15px;
    width: 0px;
    height: 0px;
    float: left;
    clear: both;
  }
</style>
<div>abc</div>
<video></video><br>
<video controls></video><br>
<img src="support/60x60-green.png"><br>
<picture>
<source srcset="support/60x60-green.png">
    <img>
</picture><br>
<canvas></canvas><br>
<svg></svg><br>
<iframe></iframe>