fabric.js limit rotation to x degrees with rotation handle

Question

I am using fabric.js and trying to allow rotation for any object on my canvas, not freely 360 degrees, but only 15 degrees at a time, using the rotation handle. I searched really hard but couldn't find an answer so far. Is this possible?

Answer 1

Shorter solution:

canvas.on('object:rotating', function(options) {
  var step = 15;
  options.target.angle = Math.round(options.target.angle / step) * step;
});

Since 1.6.7 you can just use fabric.Object.snapAngle property:

someFabricObject.snapAngle = 15;