JointJS 3.5 resize tool for element

ResizeTool.js

const ResizeTool = joint.elementTools.Control.extend({
        getPosition: function(view) {
			const model = view.model;
			if(model.attr('root/originalSize') === void 0) {
				model.attr('root/originalSize', model.attributes.size);
			}
			return {x: model.attributes.size.width, y: model.attributes.size.height};
        },
        setPosition: function(view, coordinates) {
			view.model.resize(coordinates.x, coordinates.y);
        },
        resetPosition: function(view) {
			const original = model.attr('root/originalSize') || {width: 0, height: 0};
			model.resize(original.width, original.height);
        }
    });