JS anonymous function

(function ($) {}) (jquery) = = (function ($) {}) (jquery)

is actually an anonymous function

code to store the development plug-in

function ( very useful ):

The greatest benefit of this notation is the formation of closures. In (function ($) {...}) (jQuery) functions and variables defined internally can only be valid within this scope.

The concept of whether a function function or a private variable is formed. Like what:

1. var i=3;  
2. span class= "keyword" >function init () {  
3.     alert (
4. }  
5. (function ($)  {  
6.     var i=2;  
7.      function init () {  
8.          alert (
10.   
11.     init ();   
12. }) (jQuery);   
13. init ();   

Execution Result:

Inner layer Init:2

outer Init:3

Here is an example of an experiment

<script src= "Js/jquery-1.7.1.min.js" ></script>
<script type= "Text/javascript" >

(function ($) {
Alert (1);
$.A = function (i)
//    {
alert (i.name);
This.shows = function (j)
//        {
Alert (j);
Alert (3);
ABC ();
def ();
//        }
ABC = function ()
//        {
Alert (4);
//        }
def = function ()
//        {
I.callback (666666);
//        }
//    }
//})($);
var i = new $.a ({
Name: "Sdy",
Callback:function (NO)
//    {
alert (no);
alert (1234);
//    }
//});
I.shows (123);


function MM ($) {
Alert (2);
$.A = function (i) {
alert (i.name);
This.shows = function (j) {//this is required to write
Alert (j);
Alert (1);
CC ();
}
AA = function () {
Alert ("AA");
}
bb = function () {
Alert ("BB");
}
CC = function ()
{
I.callbank ("callback function");//callback function CallBack It's okay to write wrong. haha
}
}
};
MM (JQuery);
var abc = new $.A ({
Name: "Sdy", Callbank:function (NO)
{
alert (no);
}
});
Abc.shows (1);
(function ($) {
Alert (1);
Alert ($);
}) (JQuery);

function MM ($) {
Alert (2);
//}
MM (JQuery)

(function (str) {alert (str)}) ("AAA");
Equivalent:
function Outputfun (str) {alert (str);};
Outputfun ("Output");

JS anonymous function