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chromium/third_party/blink/web_tests/external/wpt/html/webappapis/user-prompts/print-in-detached-frame.html 

<!DOCTYPE html>
<meta charset="utf-8">
<title>print() in a detached iframe</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<body>
<script>
"use strict";

test(() => {
  const iframe = document.createElement("iframe");
  document.body.append(iframe);
  const print = iframe.contentWindow.print;
  iframe.remove();

  print();
});
</script>