 green.
</div>

<script>
  test(() => {
    let elem = document.getElementById('elem');
    assert_equals(getComputedStyle(elem).color, 'rgb(255, 0, 0)');
    document.styleSheets[0].rules[1].selectorText = '.a';
    assert_equals(getComputedStyle(elem).color, 'rgb(0, 128, 0)');
  });
</script>
