text: window.onload = function() {
    var chart = new CanvasJS.Chart("chartContainer", {
      animationEnabled: true,
      theme: "light2",
      title: {
        text: "Daily Visitors"
      },
      axisY: {
        includeZero: false
      },
      data: [
        {
          type: "line",
          dataPoints: [
            { y: 450 },
            { y: 414 },
            {
              y: 520,
              indexLabel: "highest",
              markerColor: "red",
              markerType: "triangle"
            },
            { y: 460 },
            { y: 450 },
            { y: 500 },
            { y: 480 },
            { y: 480 },
            {
              y: 410,
              indexLabel: "lowest",
              markerColor: "DarkSlateGrey",
              markerType: "cross"
            },
            { y: 500 },
            { y: 480 },
            { y: 510 }
          ]
        }
      ]
    });
    setTimeout(() => {
      chart.render();
    }, 1000);
  };
  