<!DOCTYPE html>
<style>
textarea {
  line-height: 20px;
  height: 20px;
}
</style>
<p>Test passes if you can see "Pass" in textarea.</p>
<textarea placeholder="A long placeholder that gets hidden should make the textarea non-scrollable.">Pass</textarea>
<script>
var textarea = document.querySelector("textarea");
textarea.scrollTop = textarea.scrollHeight;
</script>