TypeScript enum vs const enum

const-enum.ts

// TypeScript
const enum Beta { X, Y, Z }

const A : Beta = Beta.X;

// JavaScript
var Beta;
(function (Beta) {
    Beta[Beta["X"] = 0] = "X";
    Beta[Beta["Y"] = 1] = "Y";
    Beta[Beta["Z"] = 2] = "Z";
})(Beta || (Beta = {}));

var A = 0 /* X */;

enum.ts

// TypeScript
enum Beta { X, Y, Z }

const A : Beta = Beta.X;

// JavaScript
var Beta;
(function (Beta) {
    Beta[Beta["X"] = 0] = "X";
    Beta[Beta["Y"] = 1] = "Y";
    Beta[Beta["Z"] = 2] = "Z";
})(Beta || (Beta = {}));

var A = Beta.X;

It seems to be out of date now, const enum just output var A = 0 /* X */; 😄 (Works on TypeScript 3.4)