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<!doctype html>
<html class="reftest-wait">
<script src="/tests/SimpleTest/EventUtils.js"></script>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<style>
  textarea {
    font: 13px / 1 monospace;
    border: 1px solid;
    padding: 0;
    overflow: hidden;
    resize: none;
  }
</style>
<textarea rows=5>
a
b
c
d
</textarea>
<script>
SimpleTest.waitForFocus(function() {
  let textarea = document.querySelector("textarea");
  textarea.focus();
  if (navigator.platform.startsWith("Mac")) {
    // On mac there is no page down key that moves the selection, afaict.
    // (Fn+Arrow moves the scroll position but not selection).
    // Do the next thing which would be something like Cmd+Down to move to the
    // end. That tests a different code-path altogether, but for this test it
    // doesn't matter.
    synthesizeKey("KEY_ArrowDown", { metaKey: true });
  } else {
    synthesizeKey("KEY_PageDown");
  }
  setTimeout(() => {
    document.documentElement.removeAttribute("class")
  }, 0);
});
</script>