@coderspirit/safe-env

Warning

We moved the project to another repository: https://github.com/coder-spirit/nominal/ to improve its maintenance (the NPM package is still the same).

Small library to load strongly typed values from environment variables

Install instructions

Node

# With NPM
npm install @coderspirit/safe-env

# Or with Yarn:
yarn add @coderspirit/safe-env

Deno

Safe-Env is served through different CDNs

import { ... } from 'https://denopkg.com/Coder-Spirit/safe-env@[VERSION]/safe-env/deno/index.ts'
import { ... } from 'https://deno.land/x/safe_env@[VERSION]/safe-env/deno/index.ts'

Example

import { getSafeEnv } from '@coderspirit/safe-env'

const safeEnv = getSafeEnv(process.env) // For NodeJS
// const safeEnv = getSafeEnv(Deno.env.toObject()) // For Deno

// If there's no default, the value is considered as required, and it will throw
// an exception when it's missing.
const myVariable = safeEnv.asString('MY_VARIABLE')

// We can provide defaults, so no exception will be thrown when the environment
// variable is not set.
const myVariable = safeEnv.asString('MY_VARIABLE', 'hello world')

// We can parse numbers, with some constraints
const myNumber = safeEnv.asNumber('MY_NUMBER')
const myPositiveNumber = safeEnv.asPositiveNumber('MY_POSITIVE_NUMBER')
const myInteger = safeEnv.asInteger('MY_INTEGER')
const myPositiveInteger = safeEnv.asPositiveInteger('MY_POSITIVE_INTEGER')

// We can also parse "boolean" values, It will understand:
// true, yes, 1; false, no, 0; in a case-insensitive way.
const myBoolean = safeEnv.asBoolean('MY_BOOLEAN')