testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_open_write-1.html


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<!doctype html>
1
<script>
function f() {
  opener.postMessage("original", "*");
  if (opener.data.length >= 2) {
    // If we proceed here, then our document.write will be racing with the
    // setTimeout in our opener.  Just stop.
    return;
  }
  setTimeout(function () {
    document.open();
    document.write("<!doctype html>2<script>opener.postMessage('written', '*');<\/script>");
    document.close();
  });
}

window.onload = f
</script>