Access value of env object by name

[sephentos]

I'm trying to read a variable from the env object dynamically using a string variable as the property name, but I can't.

env.ts

import { bool, cleanEnv, port, str } from 'envalid'

export default cleanEnv( process.env, {
	NODE_ENV: str( { choices: ['development', 'production'] } ),
...
} )

typeof env: object

url.ts

import env from '@/env'

export function url( envName: string): string
{
	console.log(env[envName])
// Also does not work with env.[envName]
...

typeof envName: string

results in:

Element implicitly has an 'any' type because expression of type 'string' can't be used to index type '{ NODE_ENV: "development" | "production"; ...

No index signature with a parameter of type 'string' was found on type '{ NODE_ENV: "development" | "production ...";

I don't really understand those error messages. Maybe someone could help me?
If not, is there another way to pass an env name to a function and use that to read the env value?
(e.g. call myFunc('URL_PRODUCTION') -> myFunc reads env.URL_PRODUCTION as env.[PARAM_NAME] / env[PARAM_NAME])

btw: reading process.env[envName] (bypassing envalid) works without issues

[af]

Instead of typing envName as string could you try envName: keyof typeof env? I think that should do the trick, typescript is rightfully complaining because not just any string will be a valid key of the cleaned env object. Hope that helps!