SOURCE

var Plane = function(){}

		Plane.prototype.fire = function(){
			console.log("fire")
		}
		var MissileDecorator = function(plane){
			this.plane = plane
		}

		MissileDecorator.prototype.fire = function(){
			this.plane.fire()
			console.log("发射导弹")
		}
		var AtomDecorator = function(plane){
			this.plane = plane
		}

		AtomDecorator.prototype.fire = function(){
			this.plane.fire()
			console.log("发射原子弹")
		}

		var plane = new Plane();
		plane = new MissileDecorator(plane)
		plane = new AtomDecorator(plane)

		plane.fire()