<!DOCTYPE html>
<head>
  <title>Deferred iframes with loading='lazy' use the original
         base URL specified at parse-time</title>
  <link rel="author" title="Rob Buis" href="mailto:rbuis@igalia.com">
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
  <script src="../resources/common.js"></script>
  <base href='/html/semantics/embedded-content/the-iframe-element/resources/'>
</head>

<script>
  const below_viewport_iframe = new ElementLoadPro