The difference between jquery (function () {}) and (function () {}) (jquery) in jquery

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jquery is an excellent javascrīpt framework. Let's now discuss the functions that are executed after two pages are loaded in Jquery.

 1 $(document).ready(function(){ // 在这里写你的代码... }); 


code that runs at the completion of the DOM loading can be abbreviated as

JQuery (function() {});

(function ($) {}) What do you mean by (jQuery)?
It is actually an anonymous method of executing () (para), except that the jquery object is passed. Equivalent

1 function AA ($) {} 2

Is the usual way to initialize jquery objects.

The popular point is to execute the code that you need after the page is loaded.
But this thing, sometimes will make the page bounce, many jquery plug-ins are loaded after the completion, only change the style, the page will have a bounce or flashing feeling. For example, ui.tab this plugin, page elements, all show up, it just form tab, very Dizzy said

(Funtion () {}) (); Execute the function immediately; the equivalent of declaring a function and calling it directly after the declaration is finished;

If the parameters are as follows:

(Funtion (str) {alert (str)}) ("output"));

equivalent to:

1 funtion Outputfun (str) {alert (str);} 2 outputfun ("output");

  JQuery (function () {}); The code that holds the DOM object for the operation, and the DOM object already exists when the code executes it. cannot be used to store code that develops plug-ins, because jquery objects are not passed, and external methods (functions) cannot be called by Jquery.method.
(function () {}) (JQuery) , which is used to store the code that develops the plug-in, and the DOM does not necessarily exist when executing the code, so be careful with the code to automate DOM operations directly.

(function ($) {...}) (JQuery) is actually an anonymous function that does not know that a friend can continue to look down.
here is actually anonymous function functions (ARG) {...}, which defines an anonymous function that, when the argument is arg and the function is called, the parentheses and arguments are written after the function, and because of the precedence of the operator, the function itself also needs parentheses, namely: (Function (ARG) {...}) (param) This is equivalent to defining an anonymous function with a parameter of ARG, and calling this anonymous function as a parameter, and (function ($) {...}) param (jquery) is the same, the reason why only use $ in formal parameters is to not conflict with other libraries, so the argument is using jQuery var fn = function ($) {...}; FN (jQuery); is the usual way to initialize jquery objects.

The difference between jquery (function () {}) and (function () {}) (jquery) in jquery