JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
<br/><!-- Just so that JSFiddle's Result label doesn't overlap the Chart -->
<div id="chartContainer" style="height: 360px; width: 100%;"></div>

JavaScript

var chart = new CanvasJS.Chart("chartContainer", {
  title:{
    text: "Adding Separator between Columns"
  },
  data: [{        
    type: "column",
    dataPoints: [
      { x: 10, y: 171 },
      { x: 20, y: 155 },
      { x: 30, y: 150 },
      { x: 40, y: 165 },
      { x: 50, y: 195 },
      { x: 60, y: 168 },
      { x: 70, y: 128 },
      { x: 80, y: 134 },
      { x: 90, y: 114 }
    ]
  },{        
    type: "column",
    dataPoints: [
      { x: 10, y: 71 },
      { x: 20, y: 55 },
      { x: 30, y: 50 },
      { x: 40, y: 65 },
      { x: 50, y: 95 },
      { x: 60, y: 68 },
      { x: 70, y: 28 },
      { x: 80, y: 34 },
      { x: 90, y: 14 }
    ]
  }]
});

chart.render();

/* Add Striplines to X-Axis */
for(var i = 0; i < chart.data[0].dataPoints.length - 1; i++) {
  chart.axisX[0].addTo("stripLines",{ value: (chart.data[0].dataPoints[i].x + chart.data[0].dataPoints[i+1].x) / 2, color: chart.axisX[0].lineColor}, null, false);
}
chart.render();