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


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<!doctype html>
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<script>
function f() {
  opener.postMessage("original", "*");
  setTimeout(function () {
    document.open();
    document.write("<!doctype html>2<script>opener.postMessage('written', '*');<\/script>");
    document.close();
  }), 100;
}

window.onload = f
</script>