Explain the meaning of the construction

Question

Please explain this construction on js (i.e., why you need it, when it is better to use, how to address its elements), as well as the meaning of the if-check (below):

if (!window.Upload) { var Upload = { init: function(obj, vars, options) { //... }, deinit: function(iUpload) { //... } }; }

UPD 1:

Also interested in the type of Upload 'a.

How can one understand the meaning of a construction if there is nothing in it, dots?
Not so long ago, familiar with js and never seen this before.
This is all you need to write in the question, along with all the details.
@hindmost, comments are used to clarify or clarify a question.
If I did not write this right away, then I did not know that this information was necessary.

Accepted Answer · 2016-07-20T09:40:09

 if (!window.Upload) { // если нет глобальной переменной Upload то выполняем код дальше var Upload = { // Создаём переменную Upload init: function(obj, vars, options) { // Функция инициализации //... }, deinit: function(iUpload) {// Функция уничтожения //... } }; }

Call functions like this:

 var iUpload = Upload.init(obj, vars, options); // Инициализировали iUpload Upload.deinit(iUpload); // Уничтожили iUpload

Upload is an object.

There are no classes in ws yet, there are prototypes and in es6 there is a similarity of the familiar oop syntax.
Well, I mean that an object can be used as an object - simply as a set of functions, or it can be “a class (prototype)”

Explain the meaning of the construction

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