Deep understanding of self-executing anonymous functions in JavaScript basics

Format:

(function () {
//code

Explanation: This is quite elegant code (if you first see a possible confused:), the first pair of parentheses of the enclosing function (function () {}) returns an unnamed function to the script, followed by a pair of empty parentheses that immediately executes the returned unnamed function, with the parameters of the anonymous function in parentheses.

Here's an example with a parameter:

(function (ARG) {
alert (arg+100);
}) (a);
This example returns 120.

Come back and look at jquery plugin writing

(function ($) {
 //Code goes Here
}) (JQuery); 

This code is equivalent to

var A=functon ($)
{//code
};

A (jQuery);

The above in-depth understanding of JavaScript in the implementation of the anonymous function is a small series to share all the content, hope to give you a reference, but also hope that we support the cloud habitat community.