File: 004-1.html

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thunderbird 1%3A140.4.0esr-1
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file content (28 lines) | stat: -rw-r--r-- 805 bytes parent folder | download | duplicates (11) 
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<!doctype html>
004-1
<script>
var handleBeforeUnload = function() {
  parent.beforeunload_fired = true;
  removeListener();
  setTimeout(function() {
    parent.timeout_fired = true;
  }, 1000);
}

var removeListener = function() {
  assert_true(window.removeEventListener('beforeunload', handleBeforeUnload, false));
}

window.addEventListener('beforeunload', handleBeforeUnload, false);

onload = function() {
  if (!parent.loaded) {
    parent.loaded = true;
    location="004-2.html?" + Math.random();
  }
}
</script>
// child frame with no onbeforeunload listener. Should leave the parent as unsalvageable.
// Adding the iframe prevents potential implementation bugs where the recursive steps of #prompt-to-unload-a-document
// would overwrite the salvageable state of the parent.
<iframe></iframe>