打字稿:接口中的常量 [英] Typescript: constants in an interface

问题描述

如何在打字稿的接口中放置常量.就像在java中一样:

How do I place a constant in an Interface in typescript. Like in java it is:

interface OlympicMedal {
  static final String GOLD = "Gold";
  static final String SILVER = "Silver";
  static final String BRONZE = "Bronze";
}

推荐答案

不能在接口中声明值.

您可以在模块中声明值:

You can declare values in a module:

module OlympicMedal {
    export var GOLD = "Gold";
    export var SILVER = "Silver";
}

在即将发布的 TypeScript 中，您将能够使用 const:

In an upcoming release of TypeScript, you will be able to use const:

module OlympicMedal {
    export const GOLD = "Gold";
    export const SILVER = "Silver";
}

OlympicMedal.GOLD = 'Bronze'; // Error

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