如何在chartjs甜甜圈图表悬停时更改光标？

var chart = new Chart(ctx, {
  type: 'doughnut',
  data: data,
  options: {
    hover: {
      mode: 'nearest',
      intersect: true
    },
    onHover: function(event, elements) {
      if (elements.length > 0) {
        event.target.style.cursor = 'pointer';
      } else {
        event.target.style.cursor = 'default';
      }
    },
    // 其他配置项...
  }
});