layout/reftests/bugs/1209994-2.html


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<!DOCTYPE html>
<style>
div {
  height: 240px;
}
#f {
  height: 0;
  overflow: hidden;
  padding: 0;
  border: none;
}
</style>
There should be a visible button below:
<div>
  <button id="f">This is button</button>
</div>
<script>
h = document.body.clientHeight;
f.style.height = "auto";
</script>