Mousewheel on an object

HTML

<script src="https://rawgithub.com/kangax/fabric.js/master/dist/fabric.js"></script>
<canvas id="c" width="600" height="600"></canvas>

JavaScript

var canvas = window._canvas = new fabric.Canvas('c');

var text = new fabric.Textbox("Some text", {
     width: 100,
     height: 22,
     fontSize: 12,
     editable: true
});

var rect = new fabric.Rect({
     width: 100,
     height: 22,
     fill: 'yellow'
});

var group = new fabric.Group([ rect, text ], {
  left: 30,
  top: 30
});

canvas.add(group);

group.on('selected', function (e){
    
   canvas.remove(group);
   canvas.add(rect);
   canvas.add(text);
   canvas.renderAll();
   canvas.setActiveObject(rect);

});

canvas.on('selection:cleared', function(e) {

    group = new fabric.Group([ rect, text ], {});

});