<!doctype html>
<style>
  body {
    margin: 0;
  }
  iframe {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
  }
</style>
<div style="height:200vh;"></div>
<iframe frameborder=0 scrolling=no
        src="//{{hosts[][]}}:{{ports[http][0]}}{{location[path]}}/../position-absolute-iframe-child.html"></iframe>