JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>

<div id="chartContainer" style="height: 300px; width: 100%;"></div>
<button id="selectButton">
  Select 1st Datapoint
</button>
<button id="deSelectButton">
  De Select 1st Datapoint
</button>

JavaScript

window.onload = function () {
	var chart = new CanvasJS.Chart("chartContainer", {
		title:{
			text: "My First Chart in CanvasJS"              
		},
		data: [              
		{
			// Change type to "doughnut", "line", "splineArea", etc.
			type: "line",
      
			dataPoints: [
				{ label: "apple",  y: 10  },
				{ label: "orange", y: 15  },
				{ label: "banana", y: 25  },
				{ label: "mango",  y: 30  },
				{ label: "grape",  y: 28  }
			]
		}
		]
	});
	chart.render();
	document.getElementById("selectButton").addEventListener("click", function(){
  	chart.options.data[0].dataPoints[0].markerSize = (chart.data[0].markerSize * 1.5);
    chart.render();
  });
  document.getElementById("deSelectButton").addEventListener("click", function(){
  	chart.options.data[0].dataPoints[0].markerSize = null;
    chart.render();
  });
}