function syntax

[Beyond Web Evolution]

I took over an ActionScript job.

While getting familiar with the style of coding used I came across some syntax I don't quite understand.

I could not find the answer in the forums.

Here is a snippet of code:

(function () {

var __this = {};

createjs.EventDispatcher.initialize(__this);

window.eventSource = __this;

})();

Is this declaring a function as a class?

We are publishing as Canvas/HTML5.

Thank you,

Mike

[JoãoCésar · Accepted solution]

Hi.

This is not ActionScript. This is JavaScript.

And the code is a Self Executing Anonymous Function.

A JavaScript function that runs as soon as it is defined. Also known as an IIFE (Immediately Invoked Function Expression).

Self-Executing Anonymous Function - MDN Web Docs Glossary: Definitions of Web-related terms | MDN

What are Self-Invoking Anonymous Functions in JavaScript?

Regards,

JC