jsplumb: Internet Explorer only supports "text" as format for evt.dataTransfer.setData

dream/platform/src/jsplumb/jsplumb.js

@@ -752,7 +752,7 @@
       callback = function (evt) {
         try {
           var class_name = JSON.parse(
-              evt.dataTransfer.getData('application/json')
+              evt.dataTransfer.getData('text')
             ),
             offset = $(gadget.props.main).offset(),
             relative_position = convertToRelativePosition(

dream/platform/src/jsplumb/test.js

@@ -184,8 +184,8 @@
             e.dataTransfer = {
               getData: function(type){
                  // make sure we are called properly
-                 equal('application/json', type,
-             "The drag&dropped element must have data type application/json");
+                 equal('text', type,
+             "The drag&dropped element must have data type text");
                  return JSON.stringify("Example.Node");
               }
             };
@@ -545,8 +545,8 @@
             e.dataTransfer = {
               getData: function(type){
                  // make sure we are called properly
-                 equal('application/json', type,
-             "The drag&dropped element must have data type application/json");
+                 equal('text', type,
+             "The drag&dropped element must have data type text");
                  return JSON.stringify("Example.Node");
               }
             };
@@ -647,8 +647,8 @@
             e.dataTransfer = {
               getData: function(type){
                  // make sure we are called properly
-                 equal('application/json', type,
-             "The drag&dropped element must have data type application/json");
+                 equal('text', type,
+             "The drag&dropped element must have data type text");
                  return JSON.stringify("Example.Node");
               }
             };

dream/platform/src/toolbox/toolbox.js

@@ -17,7 +17,7 @@
 
       callback = function (evt) {
         try {
-          evt.dataTransfer.setData('application/json',
+          evt.dataTransfer.setData('text',
             tool.dataset.class_name);
         } catch (e) {
           reject(e);