如何在chartjs上设置2y轴标题(和/或标签)？

var options = {
  scales: {
    yAxes: [{
      id: 'y-axis-1',
      type: 'linear',
      position: 'left',
      scaleLabel: {
        display: true,
        labelString: '左侧Y轴标题'
      }
    }, {
      id: 'y-axis-2',
      type: 'linear',
      position: 'right',
      scaleLabel: {
        display: true,
        labelString: '右侧Y轴标题'
      }
    }]
  }
};

var data = {
  datasets: [{
    label: '数据集1',
    yAxisID: 'y-axis-1',
    // 其他数据配置...
  }, {
    label: '数据集2',
    yAxisID: 'y-axis-2',
    // 其他数据配置...
  }]
};

var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
  type: 'line',
  data: data,
  options: options
});