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<!doctype html>
<title>First title</title>
<iframe srcdoc=""></iframe>
<script>
onload = function() {
// This iframe doc shouldn't override our title.
let doc = document.querySelector("iframe").contentDocument;
doc.open();
doc.write("<title>This is not your title</title>Hello");
doc.close();
if (doc.title == "This is not your title") {
// Now navigate away so that the test has something to wait for to ensure the
// relevant code has run.
let link = document.createElement("a");
link.href = window.location.href.replace("-1.html", "-2.html");
link.click();
}
}
</script>