eliminate *objectURL since problematic in Safari and we are only using svg

Author: timelyportfolio

src/snapshot/svgtoimg.js

@@ -17,7 +17,6 @@ function svgToImg(opts) {
     var promise = new Promise(function(resolve, reject) {
 
         var Image = window.Image;
-        var Blob = window.Blob;
 
         var svg = opts.svg;
         var format = opts.format || 'png';
@@ -26,6 +25,9 @@ function svgToImg(opts) {
         var ctx = canvas.getContext('2d');
         var img = new Image();
 
+        // for Safari support, eliminate createObjectURL
+        //  this decision could cause problems if content
+        //  is not restricted to svg
         var base64Svg = 'data:image/svg+xml,' + encodeURIComponent(svg);
 
         canvas.height = opts.height || 150;
@@ -74,7 +76,7 @@ function svgToImg(opts) {
             }
         };
 
-        img.src = url;
+        img.src = base64Svg;
     });
 
     // temporary for backward compatibility