enums - 使用显示值创建 TypeScript 枚举

Question

我有一个看起来像这样的 typescript 枚举:

enum State {
    NotRequired,
    Working,
    PendingReview,
    Reviewed,
    Done
}

这会产生这个:

var State;
(function (State) {
    State[State["NotRequired"] = 0] = "NotRequired";
    State[State["Working"] = 1] = "Working";
    State[State["PendingReview"] = 2] = "PendingReview";
    State[State["Reviewed"] = 3] = "Reviewed";
    State[State["Done"] = 4] = "Done";
})(State || (State = {}));

我希望这些值是一个格式良好的字符串，需要时带有空格。

所以 State[State["PendingReview"] = 2] = "PendingReview";会变成 State[State["PendingReview"] = 2] = "Pending Review";
通过像这样定义我的枚举，我设法实现了与此接近的目标:

enum State {
    "Not Required",
    Working,
    "Pending Review",
    Reviewed,
    Done
}

然而，这有一个缺点，即在代码中使用任何带有空格的枚举值，我现在必须使用我的 key 。

所以 State.PendingReview现在必须像这样使用 State["Pending Review"]
通过以某种方式为我的 key 定义一个替代显示字符串，我可以两全其美吗？

所以当我说 State[State.PendingReview]它给了我值(value) "Pending Review"

Answer 1

由于您没有为枚举指定显式值，您也可以为此使用字符串枚举(从 TypeScript 2.4 开始可用):

enum State {
  NotRequired = "Not Required",
  Working = "Working",
  PendingReview = "Pending Review",
  Reviewed = "Reviewed",
  Done = "Done"
}

显示值然后简单地变成例如 State.NotRequired .