JavaScript命名空间namespace的实现方法

网上有很多了，这里给出一个，其实思路就是A={}; A.b={};其实b是A的一个属性。只是做了一些封装，最后的效果是可以直接定义多个namespace：

   1:  My.namespace("Company", "Company.Feed", "Company.Feed.Messaging");

 

具体的实现方法，用到了arguments, eval等JavaScript函数：

   1:  //namespace的实现

   2:  var MyFramework = {};

   3:   

   4:  MyFramework.namespace=function(){ 

   5:      var a=arguments, o=null, i, j, d, rt; 

   6:      for (i=0; i<a.length; ++i) { 

   7:          d=a[i].split("."); 

   8:          rt = d[0]; 

   9:          eval("if (typeof (" + rt + ") == 'undefined'){" + rt + "= {};} o = "+ rt + ";"); 

  10:          for (j=1; j<d.length; ++j) { 

  11:              o[d[j]]=o[d[j]] || {}; 

  12:              o=o[d[j]]; 

  13:            } 

  14:        } 

  15:    };

 

使用方法：

   1:  MyFramework.namespace("MyCompany.feed", "IBM.common"); //直接定义多个namespace

   2:                

   3:  MyCompany.feed =

   4:   {

   5:       alert: function (msg) {

   6:           alert(msg);

   7:       },

   8:   

   9:       load: function () {

  10:       }

  11:   

  12:   };

  13:               

  14:  MyCompany.feed.test = function (t){

  15:    alert("MyCompany.feed.test : "+t);

  16:  };

  17:   

  18:  IBM.common.messging = function (t){

  19:    alert("IBM.common.messging: "+t);

  20:  };

  21:   

  22:  MyCompany.feed.test("def");

  23:  MyCompany.feed.alert("abc");    

  24:  IBM.common.messging("fff");

转载于:https://www.cnblogs.com/Mainz/archive/2011/07/28/2119578.html