<!DOCTYPE html>
<html>
<script>
if (window.internals)
    internals.settings.setCSSVariablesEnabled(true);
</script>
<style>
div {
  -webkit-box-reflect: -webkit-var(a) -webkit-calc(-webkit-var(b));
  -webkit-var-a: below;
  -webkit-var-b: 5px;
}
</style>
<div>This text should be reflected on the right.</div>
</html>