Static Image Export in plotly.js does not work for polar charts

[dugagjin]

Hi,

The code here

var d3 = Plotly.d3;
var img_jpg= d3.select('#jpg-export');
// Ploting the Graph
var trace={x:[3,9,8,10,4,6,5],y:[5,7,6,7,8,9,8],type:"scatter"};
var trace1={x:[3,4,1,6,8,9,5],y:[4,2,5,2,1,7,3],type:"scatter"};
var data = [trace,trace1];
var layout = {title : "Simple Javascript Graph"};
Plotly.plot(
  'plotly_div',
   data,
   layout)
// static image in jpg format
.then(
    function(gd)
     {
      Plotly.toImage(gd,{height:300,width:300})
         .then(
            function(url)
         {
             img_jpg.attr("src", url);
             return Plotly.toImage(gd,{format:'jpeg',height:400,width:400});
         }
         )
    });

is from Export Javascript plots as jpeg, png,... and it works for line charts.
But if I replace the x with t and y with r (at the trace variables) to make it a polar chart:

var d3 = Plotly.d3;
var img_jpg= d3.select('#jpg-export');
// Ploting the Graph
var trace={t:[3,9,8,10,4,6,5],r:[5,7,6,7,8,9,8],type:"scatter"};
var trace1={t:[3,4,1,6,8,9,5],r:[4,2,5,2,1,7,3],type:"scatter"};
var data = [trace,trace1];
var layout = {title : "Simple Javascript Graph"};
Plotly.plot(
  'plotly_div',
   data,
   layout)
// static image in jpg format
.then(
    function(gd)
     {
      Plotly.toImage(gd,{height:300,width:300})
         .then(
            function(url)
         {
             img_jpg.attr("src", url);
             return Plotly.toImage(gd,{format:'jpeg',height:400,width:400});
         }
         )
    });

then I don't get the exported image but I get the following error:

plotly-latest.min.js:66 Uncaught (in promise) TypeError: Cannot read property 'framework' of undefined
at e.exports (plotly-latest.min.js:66)
at plotly-latest.min.js:58
at Promise ()
at Object.n [as toImage] (plotly-latest.min.js:58)

You can find a jsfiddle here: https://jsfiddle.net/f87k57nt/ just change the x and y to respectively t and r in order to see the issue. You will see the svg of the polar plot but not the png.

[etpinard]

fixed in scatterpolar after #2200