如何在 TypeScript 中扩充 process.env? [英] How to augment process.env in TypeScript?

问题描述

process.env 是具有以下定义的 ProcessEnv 类型:

process.env is of type ProcessEnv with this definition:

export interface ProcessEnv {
    [key: string]: string | undefined;
}

我想扩充这个 TypeScript 接口，使其包含特定于我的应用程序的键，结果类似于:

I'd like to augment this TypeScript interface so that it contains the keys specific to my app, so that the result is something like:

export interface ProcessEnv {
    MY_VARIABLE_1: string;
    MY_OTHER_VARIABLE: string;
    [key: string]: string | undefined;
}

我找不到办法做到这一点，我猜它会是 declare module 或 declare namespace 某处，但找不到具体的方法来实现这一点.

I cannot find a way to do it, I guess it will be declare module or declare namespace somewhere but cannot find a specific way to achieve this.

推荐答案

ProcessEnv 必须在 namespace NodeJS 内，不需要声明 [键:字符串]:字符串|undefined;，它继承自初始的ProccessEnv.

The ProcessEnv must be inside the namespace NodeJS and doesn't need to declare the [key: string]: string | undefined;, it inherits from the initial ProccessEnv.

declare namespace NodeJS {
  export interface ProcessEnv {
    MY_VARIABLE_1: string;
    MY_OTHER_VARIABLE: string;
  }
}

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