Graph 1

by Torstein Hønsi

HTML

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.src.js"></script>
<h1>Table and SVG Chart Depicting Screen Reader Usage</h1>
<h2>Table 1</h2>  
<table border="0" cellspacing="3" cellpadding="0">
<caption>Primary desktop/laptop screen readers as reported in the <a href="http://webaim.org/projects/screenreadersurvey6/">2015 Webaim Survey</a></caption>	
	<tr>
		<th scope="col">Screen Reader</th>
		<th scope="col">Percentage of Respondents</th>
	</tr>
	<tr>
		<td>
		<a href="http://www.freedomscientific.com/Products/Blindness/JAWS">
		JAWS</a></td>
		<td>30.2</td>
	</tr>
	<tr>
		<td><a href="http://www.zoomtext.com/products/zoomtext-magnifierreader/">
		ZoomText</a></td>
		<td>22.2</td>
	</tr>
	<tr>
		<td><a href="http://www.gwmicro.com/window-eyes/">
		Window-Eyes</a></td>
		<td>20.7</td>
	</tr>
	<tr>
		<td><a href="http://www.nvaccess.org/">
		NVDA</a></td>
		<td>14.6</td>
	</tr>
	<tr>
		<td><a href="http://www.apple.com/accessibility/osx/voiceover/">
		VoiceOver</a></td>
		<td>7.6</td>
	</tr>
	<tr>
		<td>
		<a href="https://www.satogo.com/">
		System Access To Go</a></td>
		<td>1.5</td>
	</tr>
	<tr>
		<td>
		<a href="http://www.chromevox.com/">
		ChromeVox</a></td>
		<td>0.3</td>
	</tr>
	<tr>
		<td><a href="http://www.disabled-world.com/assistivedevices/computer/screen-readers.php">
		Other</a></td>
		<td>2.9</td>
	</tr>
</table>
<br>
<h2>Chart 1</h2>
<div id="container" tabindex="2"></div>

JavaScript

$(function () {

    // Plugin for increasing chart accessibility
    (function (H) {
        H.Chart.prototype.callbacks.push(function (chart) {
            var options = chart.options,
                acsOptions = options.accessibility || {},
                series = chart.series,
                numSeries = series.length,
                numXAxes = chart.xAxis.length,
                numYAxes = chart.yAxis.length,
                titleElement = document.createElementNS('http://www.w3.org/2000/svg', 'title'),
                descElement = chart.container.getElementsByTagName('desc')[0],
                textElements = chart.container.getElementsByTagName('text'),
                titleId = 'highcharts-title-' + chart.index,
                descId = 'highcharts-desc-' + chart.index,
                chartDesc,
                chartTypes = [],
                i;

            // Get label for axis (x or y)
            function getAxisLabel(axis) {
                return axis.userOptions && axis.userOptions.description || axis.axisTitle && axis.axisTitle.textStr ||
                        axis.options.id || axis.categories && 'categories' || 'Undeclared';
            }

            if (!acsOptions.enabled) {
                return;
            }

            // Hide text elements from screen readers
            for (i = 0; i < textElements.length; ++i) {
                textElements[i].setAttribute('aria-hidden', 'true');
            }

            // Enumerate chart types
            for (i = 0; i < numSeries; ++i) {
                if (chartTypes.indexOf(series[i].type) < 0) {
                    chartTypes.push(series[i].type);
                }
            }

            // Build chart description
            chartDesc = (chartTypes.length === 1 ? chartTypes[0] + ' chart, ' : '') +
                        (options.title.text ? ' Title: ' + options.title.text + '.' : '') +
                        (options.subtitle.text ? ' ' + options.subtitle.text + '.' : '') +
  ...