Export Chart Container with Padding and Border as Image using HTML2Canvas | CanvasJS JavaScript Charts

Export Chart Container with Padding and Border as Image using HTML2Canvas | CanvasJS JavaScript Charts

by canvasjs

HTML

<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
<script src="https://html2canvas.hertzen.com/dist/html2canvas.min.js"></script>
<button id="saveImage" type="button">Save as PNG</button>
<div id="container">
  <div id="chartContainer1" style="height: 300px; width: 100%;" ></div>  
</div>

CSS

#container{
  padding: 20px;
  border: 2px solid red;
}

JavaScript

var chart1 = new CanvasJS.Chart("chartContainer1", {
  title: {
    text: "Column Chart with Padding"
  },
  data: [
    {
      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 }
      ]
    }					
  ]
});

chart1.render();


$("#saveImage").click(function(e){
  html2canvas(document.querySelector("#container")).then(canvas => {      
    saveImage(canvas.toDataURL(), 'chart.png');
  });
});

function saveImage(uri, filename) {
    var link = document.createElement('a');
    if (typeof link.download === 'string') {
        link.href = uri;
        link.download = filename;        
        document.body.appendChild(link);        
        link.click();
        document.body.removeChild(link);
    } else {
        window.open(uri);
    }
}