(function ($) {...}) What do you mean by (JQuery)

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This is actually anonymous function functions (ARG) {...} This defines an anonymous function that, when the argument is arg and the function is called, is written with parentheses and arguments after the function, and because of the precedence of the operator, the function itself needs to be enclosed in 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 (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 used jquery*************************************************************** In fact, it equals var fn = function ($) {...}; FN (jQuery), which can be understood, but note that FN is a non-existent function that is defined directly and then runs. "Compress" looks like this (function ($) {...}) (jQuery) ************************************************************************** Simple to understand is (function ($) {...}) (JQuery) is used to define a number of functions that need to be predefined (function () {}) to run \ Execute those preprint-defined functions after the DOM loading is complete. ***************************************** Share some of the lessons learned when developing jquery plugins. First, look at JQuery (function () {}); Full write as JQuery (document). Ready (function () {}); The meaning is that the ready () method is executed after the DOM has been loaded. Second, see (function () {}) (jquery), which is actually an anonymous method of executing () (para), except that the JQuery object is passed. Summarize jQuery (function () {}), which is used to store the code that operates the DOM object, and the DOM object already exists when executing the code. 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 ($) {...}) What does (jQuery) mean