javascript - Exporting a d3.js overlay on top of a Bing Map using html2canvas -

has attempted use html2canvas bing maps. have been able html2canvas work google maps need work bing maps. when attempt export svg d3.js overlay ontop of bing map looks this?

my html2canvas export code follows:

 html2canvas($svg, {  proxy: "",  usecors: true,  background: "#e8f0f6",  onrendered: function (canvas) {              var = document.createelement('a');             a.download = name;             a.href = canvas.todataurl('image/png');             document.body.appendchild(a);             a.click();           },         width: 450,         height: 700,      });