ES6でenum（列挙型）を実現する - Qiitaclass HTTP_METHOD { static get get() { return HTTP_TYPE_OBJECT.get; } static get post() { return HTTP_TYPE_OBJECT.post; } static get put() { return HTTP_TYPE_OBJECT.put; } static get delete() { return HTTP_TYPE_OBJECT.delete; } get string() { switch (this) { case HTTP_TYPE.get: return 'GET'; case HTTP_TYPE.post: return 'POST'; case HTTP_TYPE.put: return 'PUT'; case HTTP_TYPE.delete: return 'DELETE
