如何在 Typescript 中定义正则表达式匹配的字符串类型? [英] How to define a regex-matched string type in Typescript?

问题描述

是否可以定义一个接口，其中包含有关字符串格式的一些信息?以下面的例子:

Is it possible to define an interface which has some information on the format of a string? Take the following example:

interface timeMarkers{
    markerTime: string[]        
};

一个例子是:

{
   markerTime: ["0:00","1:30", "1:48"]                   
}

我的问题:有没有办法定义 markerTime 的类型，使得字符串值必须始终与此正则表达式匹配，而不是简单地将其声明为 string[] 从那里去?

My question: Is there a way to define the type for markerTime such that that the string value must always match this regex, instead of declaring it as simply string[] and going from there?

var reg =/[0-9]?[0-9]:[0-9][0-9]/;

推荐答案

没有办法定义这样的类型.GitHub 上有一个提案来支持这一点，但目前似乎不是优先事项.对其进行投票，也许团队可能会将其包含在未来的版本中.

There is no way to define such a type. There is a proposal on GitHub to support this, but it currently does not appear to be a priority. Vote on it and maybe the team might include it in a future release.

编辑

从 4.1 开始，您可以定义一种类型来验证字符串，而无需实际定义所有选项:

Starting in 4.1 you can define a type that would validate the string without actually defining all the options:

type MarkerTime =`${number| ''}${number}:${number}${number}`

let a: MarkerTime = "0-00" // error
let b: MarkerTime = "0:00" // ok
let c: MarkerTime = "09:00" // ok

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