问在带有typescript的角度向jqxGrid小部件注入chart.js迷你图

EN

 public columns = [
    {...},
    { text: 'Price Histiory', datafield: 'priceHistory', outerHeight: 100, innerHeight: 100, width: 200, cellsRenderer: (row: any, column: any, value: any, rowData: any) => {
     
        let chart = '<div><canvas id="chart' + row + '"></canvas></div>'
        this.testy('chart'+row, value)
        return chart
          }
        }
  ]

  async testy(chart, value){
    await chart
    const ctx = <HTMLCanvasElement> document.getElementById(`${chart}`);
    ctx.style.height = '35px'
    ctx.style.width = '200px'
 
    const myChart = new Chart(ctx, {
      type: 'line',
      data: {
        datasets: [{
          label: '',
          data: [value],
          fill: true,
          borderColor: 'red',
          tension: 0.1
        }]
      }
      }) 
      return myChart
    }