javascript使用闭包实现AOP

 <script type="text/javascript">    Function.prototype.before = function(beforefn){      var _self = this;      return function(){        beforefn.apply(this, arguments);        return _self.apply(this, arguments);      }    };  Function.prototype.after = function(afterfn){    var _self = this;    return function(){      var ret = _self.apply(this, arguments);      afterfn.apply(this, arguments);      return ret;    }  }  var func = function(){    console.log('执行函数....')  }var exeFunc = func.before(function(){  console.log('before....');}).after(function(){  console.log('after....')});exeFunc();</script>

执行结果:

before....执行函数....after....