如何覆盖通过@types/package 安装的不正确的 TypeScript 类型定义

问题描述

说我想在我的 TypeScript 项目中使用 dotenv 模块并使用 npm install @types/dotenv --save 安装它的 .d.ts.然后我意识到类型不正确.例如，config() 函数不返回布尔值，而是返回更丰富的对象.

Say that I want to use dotenv module in my TypeScript project and install its .d.ts using npm install @types/dotenv --save. Then I realize that the types are not correct. For example, the config() function doesn't return boolean but a richer object.

我该如何处理这种情况?我是否应该将下载的类型定义复制到另一个文件，手动更新并卸载@types/dotenv?有没有更好的办法?(我需要立即修复，而不是在上游维护者合并之后.)

How do I deal with this situation? Should I just copy the downloaded type definition to another file, update it manually and uninstall @types/dotenv? Is there a better way? (I need the fix right away, not after it has been merged by upstream maintainers.)

推荐答案

我会检查 dotenv 的版本和 @types/dotenv 的版本是否对齐，这可能是功能缺失的原因.

I would check that the version of dotenv and the version of @types/dotenv are aligned, that may be the cause of the function missing.

如果是，那么更简洁的方法是自己修改 .d.ts.

If they are then the cleaner way would be to modify the .d.ts yourself.

为了做到这一点:npm remove @types/dotenv.在您的项目上创建一个文件夹 types.将 node_modules/@types 中的整个 文件夹 dotenv 复制到其中.

In order to do this: npm remove @types/dotenv. Create a folder types on your project. Copy the whole folder dotenv found in node_modules/@types into it.

然后在其中修复您的 d.ts 并修改您的 tsconfig.json 以告诉它也在您的新文件夹中查找带有 typeRoots 的缺失类型，如下所示:

Then fix your d.ts in it and modify your tsconfig.json to tell it to also look in your new folder for missing types with typeRoots like this:

{
"compilerOptions": {
    "module": "commonjs",
    "noImplicitAny": true,
    "typeRoots": [
        "./node_modules/@types",
        "./types/",
    ]
},
"files": ["./app.ts"]
}

(不要忘记添加 ./node_modules/@types 或其他使用 npm 获得的类型，这些类型将不再被找到.)

(Don't forget to add ./node_modules/@types or other types you got with npm that won't be found anymore.)

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