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Click on the button to see me

This sample demonstrates how to get DataViz Chart image data URL with chart.toDataURL(mimetype) method.

The DataViz Chart can export its image to a data URL (e.g., data:image/png;base64,iVBORw0KGg...). This data may then be rendered in the browser, which could then be saved.

For detailed implementation, please take a look at the HTML code tab.
 
<!DOCTYPE html>
<html>
<head>
	<title>
	Get Image Data URL Example - JavaScript Chart by DataViz Charts
</title>
	<link rel="stylesheet" type="text/css" href="../../css/dataviz.chart.css" />
	<link rel="stylesheet" type="text/css" href="../../themes/le-frog/styles.css" />
	<script src="../../js/dataviz.chart.min.js" type="text/javascript"></script>
	
	<script lang="javascript" type="text/javascript">
		var background = {
			type: 'linearGradient',
			x0: 0,
			y0: 0,
			x1: 0,
			y1: 1,
			colorStops: [
				{ offset: 0, color: '#d2e6c9' },
				{ offset: 1, color: 'white' }
			]
		};

		var fillStyle = {
			type: 'linearGradient',
			x0: 0,
			y0: 0,
			x1: 1,
			y1: 0,
			colorStops: [
				{ offset: 0, color: '#65c2e8' },
				{ offset: 0.49, color: '#55b3e1' },
				{ offset: 0.5, color: '#3ba6dc' },
				{ offset: 1, color: '#2794d4' }
			]
		};

		var chart = new DataViz.Chart({
			title: 'Get Image Data URL',
			legend: { visible: false },
			border: { strokeStyle: '#6ba851' },
			background: background,
			series: [
				{
					type: 'column',
					title: 'Column',
					data: [['A', 46], ['B', 35], ['C', 68], ['D', 30], ['E', 27], ['F', 85], ['D', 43], ['H', 29]],
					fillStyle: fillStyle
				}
			]
		});
		chart.write('container');

		function toDataURL() {
			var dataURL = chart.toDataURL('image/png');
			document.getElementById("canvasImg").src = dataURL;
		}
	</script>

</head>
<body>
	<div>
		<input id="button" type="button" onclick="toDataURL()" value="Click to view the chart as an image" />
		<br />
		<table>
			<tr>
				<td>
					<div id="container" style="width: 300px; height: 250px;">
					</div>
				</td>
				<td>
					<img src="" style="width: 300px; height: 250px;" id="canvasImg" alt="Click on the button to see me" />
				</td>
			</tr>
		</table>
	</div>
</body>
</html>