Highcharts export module giving error - highcharts

Question

I am trying to get image from Highchart export module, and it is giving image with
chart input data error, syntax error : Unexpected EOF.
Please see code in this js fiddle.
http://jsfiddle.net/GopinathGD/3xy8aeb7/
$(function () {
$("#b").click(testPOST);
var exportUrl = 'http://export.highcharts.com/';
function testPOST() {
var dataStr= {
"colors": [
"#C00000"
],
"chart": {
"type": "bar"
},
"title": {
"text": "Current Analysis Competitive Index",
"style": {
"fontWeight": "bold",
"color": "rgba(164, 0, 31, 0.96)"
}
},
"subtitle": {
"text": "Source: © 2017 Current Analysis, Inc."
},
"xAxis": {
"tickWidth": 1,
"minPadding": 0,
"maxPadding": 0,
"categories": [
"Overall",
"Vision/Strategy",
"Momentum & Stability",
"Innovation",
"Product Portfolio",
"Go-to-Market",
"Service & Support"
],
"title": {
"text": null
},
"labels": {
"style": {
"color": "#000000",
"fontWeight": "bold",
"fontSize": "12px"
}
}
},
"yAxis": {
"min": 0,
"max": 10,
"tickInterval": 1,
"tickmarkPlacement": "off",
"categories": [
"",
"Vulnerable",
"",
"Competitive",
"",
"Strong",
"",
"Very Strong",
"",
"Leader",
""
],
"title": {
"text": "",
"align": "high"
},
"labels": {
"style": {
"color": "#000000",
"fontWeight": "bold",
"fontSize": "12px"
}
}
},
"plotOptions": {
"bar": {
"dataLabels": {
"enabled": false
},
"pointpadding": 0,
"groupPadding": 0
},
"series": {
"animation": false,
"pointWidth": 9,
"pointPadding": 0,
"groupPadding": 0.1
}
},
"legend": {
"margin": 30
},
"series": [
{
"name": "BlackBerry - Consumer Platforms and Devices",
"data": [
3,
3,
3,
3,
2,
6,
6
]
}
]
};
var optionsStr = JSON.stringify(dataStr),
dataString = encodeURI('async=true&options='+optionsStr+'&type=jpeg&width=400');
if (window.XDomainRequest) {
var xdr = new XDomainRequest();
xdr.open("post", exportUrl+ '?' + dataString);
xdr.onload = function () {
console.log(xdr.responseText);
$('#container').html('<img src="' + exporturl + xdr.responseText + '"/>');
};
xdr.send();
} else {
$.ajax({
type: 'POST',
data: dataString,
url: exportUrl,
success: function (data) {
console.log('get the file from relative url: ', data);
$('#container').html('<img src="' + exportUrl + data + '"/>');
},
error: function (err) {
debugger;
console.log('error', err.statusText)
}
});
}
}
});
<script src="http://code.highcharts.com/highcharts.js"></script>
Run Code

Answer 1

The reason is two ampersands used in the xAxis.categories.
"categories": [
"Momentum & Stability",
...
"Service & Support"
],
Change ampersands to %26
"categories": [
"Overall",
"Vision/Strategy",
"Momentum %26 Stability",
"Innovation",
"Product Portfolio",
"Go-to-Market",
"Service %26 Support"
],
create a callback which encodes ampersands (callback is called on the server):
function callback () {
const categories = this.xAxis[0].categories.map(decodeURIComponent)
this.xAxis[0].setCategories(categories)
}
Append the callback to dataString:
dataString = encodeURI('async=true&options='+optionsStr+'&type=jpeg&width=400&callback=' + callback.toString());
example: http://jsfiddle.net/erayy8jn/