Template for issues

HTML

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

CSS

canvas {
    border: 1px solid #999;
}

JavaScript

(function() {

  fabric.Paragraph = fabric.util.createClass(fabric.Textbox, {
    type: 'paragraph',
    initialize: function(element, options) {
    
      this.set({
	      autoHeight: options.autoHeight === undefined ? true : options.autoHeight,
      });
      this.callSuper('initialize', element, options);
      
//      alert(options.autoHeight);
      this.set({
        clipTo: function(ctx){
          ctx.rect(-this.width / 2, -this.height / 2,this.width, this.height);
        }.bind(this)
      });
       
      this.on('scaling', function(){
        this.set({
          scaleX: 1,
          scaleY: 1,
          clipTo: function(ctx){
            ctx.rect(-this.width / 2, -this.height / 2,this.width, this.height);
          }
        });
      });

    },
    calcTextHeight: function() {
    	if (!this.autoHeight) {
        return this.height;
	    } else {
        var lineHeight, height = 0;
        for (var i = 0, len = this._textLines.length; i < len; i++) {
          lineHeight = this.getHeightOfLine(i);
          height += i === len - 1 ? lineHeight / this.lineHeight : lineHeight;
        }
        return height;
      }
    },
  });

  var setObjectScaleOverridden = fabric.Canvas.prototype._setObjectScale;
  
  fabric.Canvas.prototype._setObjectScale = function(localMouse, transform, lockScalingX, lockScalingY, by, lockScalingFlip, _dim) {
      var t = transform.target;
      if (by === "equally" && t instanceof fabric.Paragraph) {
          var tw = t._getTransformedDimensions().x;
          var w = t.width * (localMouse.x / tw);
          var th = t._getTransformedDimensions().y;
          var h = t.height * (localMouse.y / th);
          t.set('width', w);
          t.set('height', h);
          return true;
      } else if (by === "x" && t instanceof fabric.Paragraph) {
          var xtw = t._getTransformedDimensions().x;
          var xw = t.width * (localMouse.x / xtw);
          t.set('width', xw);
          return true;
      } else if (by...