javascript AOP

gistfile1.html

	<script type="text/javascript">
	//所谓AOP
	//在执行B前先执行A，
	//执行完B后再执行C
	Function.prototype.before = function(beforefn){
		var __self = this;
		console.log(__self);
		return function(){
			beforefn.apply(this,arguments);
			return __self.apply(this,arguments);
		}
	}
	Function.prototype.after = function(afterfn){
		var __self = this;
		/*
			this => __self => function(){
						beforefn.apply(this,arguments);
						return __self.apply(this,arguments);
					}
		*/
		return function(){
			var ret = __self.apply(this,arguments);
			afterfn.apply(this,arguments);
			return ret;
		}
	}
	var func = function(){
		console.log('B');
	}

	func = func.before(function(){
		console.log('A')
	}).after(function(){
		console.log('C')
	});

	func()


	</script>