jQuery addClass example

Change class name on click in jQuery

HTML

<script src="https://cdn.jsdelivr.net/npm/chart.js@2.8.0/dist/Chart.min.js"></script>
<canvas id="myChart" width="400" height="400"></canvas>

JavaScript

var ctx = document.getElementById("myChart").getContext('2d');
    var img = new Image();
    var img1 = img.src = 'https://cdn0.iconfinder.com/data/icons/tiny-icons-1/100/tiny-15-512.png';
    var imageData = {
        datasets: [{
            pointStyle: [img1, 'rect', 'triangle', 'circle'],
            data: [
                {x: 1.447377, y: -0.014573},
                {x: 2.365398, y: -1.062847}, 
                {x: -2.507778, y: 0.389309},
                {x: -0.432636, y: 0.124841}
            ]
        }]
    }
    var myChart = new Chart(ctx, {
        type: 'scatter',
        data: imageData,
        options: {}
    });