javascript闭包的高级使用方法实例

复制代码 代码如下:

var blogModule = (function (my) {
 my.AddPhoto = function () {
//添加内部代码
 };
 return my;
}(blogModule));

复制代码 代码如下:

var blogModule = (function (my) {var oldAddPhotoMethod = my.AddPhoto;
 my.AddPhoto = function () {  // 重载方法，依然可通过oldAddPhotoMethod调用旧的方 }; return my;}(blogModule));

复制代码 代码如下:

var blogModule = (function (old) { var my = {}, key; for (key in old) { if (old.hasOwnProperty(key)) { my[key] = old[key]; } } var oldAddPhotoMethod = old.AddPhoto; my.AddPhoto = function () { // 克隆以后，进行了重写，当然也可以继续调用oldAddPhotoMethod }; return my; } (blogModule));

复制代码 代码如下:

var blogModule = (function (my) { var _private = my._private = my._private || {}, _seal = my._seal = my._seal || function () { delete my._private; delete my._seal; delete my._unseal; }, _unseal = my._unseal = my._unseal || function () { my._private = _private; my._seal = _seal; my._unseal = _unseal; }; return my; } (blogModule || {}));