SOURCE

var plane = {
			fire:function(){
				console.log("发射普通子弹")
			}
		}

		var MissileDecorator = function(){
			console.log("发射导弹")
		}
		var AtomDecorator = function(){
			console.log("发射原子弹")
		}

		var fire1 = plane.fire;
		plane.fire = function(){
			fire1()
			MissileDecorator();
		}

		var fire2 = plane.fire;
		plane.fire = function(){
			fire2()
			AtomDecorator()
		}

		plane.fire()