Examples of advanced usage methods for JavaScript closures

This article presents an example of the advanced usage method for JavaScript closures, with the need for friends to refer to

Extended
Code:

Copy Code code as follows:


var blogmodule = (function (my) {


My. Addphoto = function () {


//Add internal code


 };


return to my;


} (Blogmodule));

Say:
It passes itself into the method, and then implements the extension of the method, sort of like part assembly.
Code:

Copy Code code as follows:


var blogmodule = (function (me) {var oldaddphotomethod = My. Addphoto;


My. Addphoto = function () {//overloaded method, still able to invoke old side} via Oldaddphotomethod; return to my;} (Blogmodule));

Say:
The advantage is that you can call the previous method.
Cloning and inheritance
Code:

Copy Code code as follows:


var Blogmodule = (function (old) {var i = {}, key; for (key) {if (Old.hasownproperty (key)) {My[key] = Old[key]; } var Oldaddphotomethod = old. Addphoto; My. Addphoto = function () {//After cloning, the rewrite, of course, you can continue to invoke Oldaddphotomethod}; return to my; } (Blogmodule));

Say:
A simple cloning implementation
Share private objects across files
Code:

Copy Code code as follows:


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 to my; } (Blogmodule | | {}));

Say:
Blogmodule._seal () lock, _unseal () unlock, to achieve the privatization of internal variables. I don't think it's the best way to do this, but we can learn the lock-locked function.