Javascript enum

getEnum = function(values) {
    var obj = {};
    values.forEach((v, iter) => {
        Object.defineProperty(obj, v, {
            enumerable: true,
            get() {
                return v
            }
        });

    });

    Object.freeze(obj)
    return obj;
}

const months = getEnum(["Jan", "Feb", "Mar"])
console.log(months);
console.log(months.Jan);