Your env handling is wrong in TypeScript

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[pawelula]

curious what's the state of the art right now with dead code elimination? I remember that some frontend bundlers were just replacing `process.env.FOO` with the exact value of `FOO` at the build time making it later easy by the minifier to remove dead code.
But not so sure if that's still the case, maybe bundlers are smarter than before.

[brunolm]

Normally what I do and what I've seen is people exporting an object manually parsing the env vars they want and adding fallbacks etc. That adds types to every prop.

Like

```
export const config = {
timeout: +process.env.TIMEOUT || 0
}
```

config.timeout // will be a number

[ThanHtutZaw]

but why using env.ts instead of .env what is difference .