javascript构造枚举类型

常用方式

这是最常见的方式，也是我之前经常用的。

var Color = {
  Red: 0,
  0: 'Red',
  Green: 1,
  1: 'Green',
  Blue: 2,
  2: 'Blue'
}

TypeScript编译出的枚举代码

var Color;
(function (Color) {
    Color[Color["Red"] = 0] = "Red";
    Color[Color["Green"] = 1] = "Green";
    Color[Color["Blue"] = 2] = "Blue";
})(Color || (Color = {}));