slow-message-source-with-history-and-location.html

Enable keyboard shortcuts

<!DOCTYPE html>

<meta charset="utf-8">

<title>Subframe or popup</title>

<script>

"use strict";

(window.opener || window.parent).postMessage(

  { historyLength: history.length, locationHref: location.href },

"*"

);

</script>

<!--

  This delays the load event, hopefully long enough that we can do whatever before-load action we're aiming for.

-->

<img src="/common/slow.py">