fabricjs FabricJS canvas Serialization Canvas Serilization

Example

<canvas id = "canvas" height='400' width='500'></canvas>

var canvas = new fabric.Canvas(document.getElementById('canvas'));
console.log(JSON.stringify(canvas)); // '{"objects":[],"background":""}'

canvas.add(new fabric.Rect({
  left: 10,
  top: 10,
  height: 50,
  width: 50,
  fill: 'green',
     stroke:'black'
}));
canvas.renderAll();

console.log(JSON.stringify(canvas));//logs the string representation
console.log(canvas.toObject());//logs canvas as an object
console.log(canvas.toSVG());//logs the SVG representation of canvas

Fiddle