import.meta.env类型造成歧义

[zhou-tao]

Describe the bug

尽管在 env.d.ts 中 ImportMetaEnv interface中 定义了环境变量 booblean 或者其他非 string 类型
在客户端使用import.meta.env仍得到一个string类型的值，但得到的 typescript 的类型提示确是自己定义过的

这可能会引起一个隐藏错误或歧义！

目前解决方案是所有 ImportMetaEnv 内属性均定义为 string , 自己手动转换为对应类型。这样不会导致直接使用 import.meta.env 得到一个与值不对应类型的类型提示。

我觉得这点需要在文档中标注出来！

Reproduction

System Info

System:
    OS: Windows 10 10.0.18363
    CPU: (16) x64 Intel(R) Xeon(R) CPU E5-2665 0 @ 2.40GHz
    Memory: 8.24 GB / 15.92 GB
  Binaries:
    Node: 14.17.4 - E:\software\node\node.EXE
    Yarn: 1.22.10 - ~\AppData\Roaming\npm\yarn.CMD
    npm: 6.14.14 - E:\software\node\npm.CMD
  Browsers:
    Edge: Spartan (44.18362.449.0)
    Internet Explorer: 11.0.18362.1
  npmPackages:
    @vitejs/plugin-legacy: ^1.6.4 => 1.6.4
    @vitejs/plugin-vue: ^2.0.0 => 2.1.0
    @vitejs/plugin-vue-jsx: ^1.3.3 => 1.3.3
    vite: 2.7.13 => 2.7.13

Used Package Manager

pnpm

Logs

No response

Validations

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• The provided reproduction is a minimal reproducible example of the bug.

[scottopherson]

#6637

[bluwy]

Closing as duplicate of #6637. Vite uses dotenv which parses .env files as string key-value pairs.

[scottopherson]

@bluwy would it make sense to keep this topic in an issue instead of a discussion? ImportMetaEnv interface is incorrect and should be tracked as an issue imo.

[bluwy]

There was a PR to fix it at #4415 but was closed due to #4415 (comment). It seems like it make sense to type is as any though

[skimhugo]

As far as I know, we can just obtain a boolean env var via define which is compatible with esbuild.