如何在angular ng2图表中使用Chart.Tooltip.positioners.cursor？

npm install ng2-charts chart.js --save

import { Component } from '@angular/core';
import { ChartOptions } from 'chart.js';
import { Label, SingleDataSet } from 'ng2-charts';

@Component({
  selector: 'app-chart',
  templateUrl: './chart.component.html',
  styleUrls: ['./chart.component.css']
})
export class ChartComponent {
  public chartOptions: ChartOptions = {
    tooltips: {
      position: 'cursor',
      mode: 'nearest',
      intersect: false
    }
  };
  // 其他图表相关的数据和配置
}

<div style="display: block">
  <canvas baseChart 
    [data]="chartData"
    [labels]="chartLabels"
    [options]="chartOptions"
    [chartType]="'bar'"
  ></canvas>
</div>