本文实例讲述了JavaScript类继承及实例化的方法。分享给大家供大家参考。具体如下：

(function(){ var Class = { //扩展类 create: function(aBaseClass, aClassDefine){ var $class = function(){ for(var member in aClassDefine){ this[member] = aClassDefine[member]; } if('undefined'===typeof aClassDefine.initialize){ this.initialize = function(){}; } }; if('function' ===typeof aBaseClass){ $class.prototype = new aBaseClass(); }else if('object' ===typeof aBaseClass){ $class.prototype = aBaseClass; } return $class; }, //实例化类 new: function(jclass,args){ var jclass = new jclass(); if(jclass.initialize){ jclass.initialize.apply(jclass, args); } return jclass; } }; //export window.Class = Class;})();

示例：

//基类对象或函数var obj = { name: 'BaseName', init: function(){ //... }, //...};var fun = function(){ this.name = ''; var init = function(){ //.. . }; var getName = function(){ return this.name; }, var setName = function(name){ this.name = name; return this;//链式操作支持 }, //...};//从Object继承var class_frome_obj = Class.create(obj,{ initialize: function(){ //构造函数 }, getName: function(){ return this.name; }, setName: function(name){ this.name = name; return this;//链式操作支持 }, //...});//从Function继承var class_frome_fun = Class.create(fun,{ initialize: function(){ //构造函数 }, //...});//从空对生成基类var class_frome_base = Class.create({},{ initialize: function(){ //构造函数 }, //...});//实例化var get_class_frome_obj = Class.new(class_frome_obj,[arg1,arg2,...]);var get_class_frome_fun = Class.new(class_frome_fun,[arg1,arg2,...]);var name1 = get_class_frome_obj.getName();//console.log(name1);//BaseNamevar name2 = get_class_frome_obj.setName('NewName').getName();//console.log(name2);//NewName

希望本文所述对大家的javascript程序设计有所帮助。