How to determine if JSON has already been loaded?

Question

JSON

Made a JSON request. The data has arrived.
But I can't use them outside of $.get ! Why is the alert not displayed?

$(function(){

$.get('file.php',	obrabotka,'json');

function obrabotka(data){
  var arr = Object.keys(data).map((key) => [key, data[key]]	);
  };
alert("снаружи"+arr);

});

PS: I use jQuery

Answer 1

Getting JSON via ajax is an asynchronous operation. JavaScript, on the other hand, is synchronous, so the $.get and alert calls happen instantly one after the other, and only then the obrabotka function is called .
You can only access arr inside the obrabotka function .