 <div id="target"></div>
    <script>
      test(() => {
        target.style.rowRuleStyle = 'solid';
        target.style.rowRuleWidth = '10px';
        target.style.rowRuleColor = 'black';
        var animation = target.animate([{}, {rowRuleColor: 'rgb(255, 0 , 0)'}], 1000);
        animation.pause();
        animation.currentTime = 500;
        assert_equals(getComputedStyle(target).rowRuleColor, 'rgb(128, 0, 0)');
      }, 'gap decorations row-rule-color supports neutral keyframe.');
    </script>
  </b