The difference between the anonymous function $ (function () {}) and (function () {}) () in JS

"$ (function () {});" The anonymous function of the jquery syntax, which holds the code that operates the DOM object, and the DOM object already exists while executing the code;

(This allows you to load some data asynchronously via AJAX when the page load is complete.)

(function () {}) (); The code used to store the development plug-in, the DOM does not necessarily exist when executing the code;

(For loading at content loading or before loading)

Example:

This example will be error when running in the browser (function () {...}) The execution time of the function is not executed until the DOM is loaded, but as the page executes from top to bottom

        <input type= "hidden" id= "name" name= "name" value= "Gaohuanjie" >
The difference between the anonymous function $ (function () {}) and (function () {}) () in JS