joicomponents/test/route/iframes/f.html

Design patterns to build native web components

<iframe src="base_parent.html" frameborder="0" style="border: 5px solid crimson"></iframe>
<script>
  var b= document.createElement("base");
  b.setAttribute("href", "https://bbc.com/");
  document.head.appendChild(b);
</script>