Is there a difference in declaring an anonymous javascript wrapper function?

Question

JavaScript

When studying the coffee-script language, the question arose: is there a difference in the declaration of an anonymous wrapper function on javacript, in the form of a self-calling function without explicitly specifying the call context:

(function(){
//какой-то код
})();

from declaring such a wrapper dictated by the coffee-script compiler?

(function(){
//какой-то код
}).call(this);

Is there any sense in indicating the context? Or does the javascript interpreter treat both declarations of such a function in the same way?

Answer 1

In the first one, in non-strict mode, this will be the global object. In strict mode - null (or undef, I don't remember).
In the second in the global scope, there will again be a global object. Inside a method, this is the method's this. Apparently, this is done to save the context inside the methods.
2016 is not the best year for learning cofeescript, learn es6 or typescript better.