What is ((window) => { ...})(window); meaning

Question

I file in a project contains the following code:

 //begin of the file
 ((window) => {
    'use strict';
class View extends GSM.EventEmitter {

    constructor() {
        super();
//some function here

}
})(window);
//end of the file

What does this structure mean?
What is this line for ((window) => {}(window); ?
What does constructor()mean ?

My English a little poor,hope I make the question clear.:-)

Is my answer helpful?, or you need more information??? – Parag Bhayani Jun 12 '16 at 08:16 — Parag Bhayani, Jun 12 '16 at 08:16

score 3 · Accepted Answer · answered Jun 12 '16 at 07:58

3

es6 arrow function, for more detail https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Functions/Arrow_functions

and class https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Classes

answered Jun 12 '16 at 07:58

Josh Lin

2,397
11
21

score 1 · Answer 2 · edited May 23 '17 at 11:59

1

This is Module Pattern written on ES6. It allows you group your variables in the same scope and isolate them from other "modules".

(function(/* your deps */){
  //your code
  var privateVariable;
}(/* your dependencies */))

You can find more detailed answer about it here.

constructor function allows you initialize your class instance.

edited May 23 '17 at 11:59

Community

1
1

answered Jun 12 '16 at 08:00

LazyCat01

957
7
23

What is ((window) => { ...})(window); meaning

2 Answers2