Download Highchart as PNG - V2

Use canvg and msSaveOrOpenBlob for IE compatibility

HTML

<script src="http://code.highcharts.com/4.0.4/highcharts.js"></script>
<script src="http://code.highcharts.com/4.0.4/modules/exporting.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/amcharts/3.10.0/exporting/canvg.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/amcharts/3.10.0/exporting/rgbcolor.min.js"></script>
<div id='container'></div>
<button id='save_btn'>Save Chart</button>

CSS

#container {
    max-width: 800px;
    height: 400px;
    margin: 1em auto;
}

JavaScript

EXPORT_WIDTH = 1000;

function save_chart(chart, filename) {
    var render_width = EXPORT_WIDTH;
    var render_height = render_width * chart.chartHeight / chart.chartWidth

    var svg = chart.getSVG({
        exporting: {
            sourceWidth: chart.chartWidth,
            sourceHeight: chart.chartHeight
        }
    });

    var canvas = document.createElement('canvas');
    canvas.height = render_height;
    canvas.width = render_width;

    canvg(canvas, svg, {
        scaleWidth: render_width,
        scaleHeight: render_height,
        ignoreDimensions: true
    });

    download(canvas, filename + '.png');
}

function download(canvas, filename) {
    download_in_ie(canvas, filename) || download_with_link(canvas, filename);
}
  
// Works in IE10 and newer
function download_in_ie(canvas, filename) {
    return(navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob(canvas.msToBlob(), filename));
}

// Works in Chrome and FF. Safari just opens image in current window, since .download attribute is not supported
function download_with_link(canvas, filename) {
    var a = document.createElement('a')
    a.download = filename
    a.href = canvas.toDataURL("image/png")
    document.body.appendChild(a);
    a.click();
    a.remove();
}

$(function() {

    $('#container').highcharts({

        exporting: {
            enabled: false
        },

        title: {
            text: 'Client-Side Download Example'
        },

        subtitle: {
            text: 'Click "Save Chart" to download chart as PNG'
        },

        chart: {
            type: 'area'
        },

        xAxis: {
            categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
                'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
        },

        series: [{
            data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
        }]

    });
    
    $('#save_btn').click(function() {
        save_chart($('#container').highcharts(), 'chart');
   ...