read-env-vars

Getting Started

npm i read-env-vars

Usage

import readEnvVars from "read-env-vars";
/**
 *  PREFIX__KEY1=1
 *  PREFIX__KEY2=a
 *  PREFIX__KEY3__KEY=b
 *  PREFIX__KEY4_0=c
 */
/**
 * {
 *    "key1": 1,
 *    "key2": "a",
 *    "key3": { "key": "b" },
 *    "key4": ["c"]
 * }
 */
const vars = readEnvVars("PREFIX");

Every variables MUST start with the prefix and separator (default to __). Also, the key will be converted to camel-case (Can be changed).

Scalar

# Mapped as `{ "key1": 1 }`
PREFIX__KEY1=1
# Mapped as `{ "key2": "a" }`
PREFIX__KEY2=a
# Mapped as `{ "key3": true }`
PREFIX__KEY3=true

Object

By using the separator, the key will be considered nested as an object.

# Mapped as `{ "key1": { "key2": "a" } }`
PREFIX__KEY1__KEY2=a

Array

By ending a key with _<number>, it will be considered as an array.

# Mapped as `{ "key1": ["a"] }`
PREFIX__KEY1_0=a

Options

source

• Type: Record<string, string | undefined>
• Default: process.env

Source of the environment variables

separator

• Type: string
• Default: __

Separator of object key

camelCase

• Type: camelcase.Options
• Default: undefined

Options passed to camelcase.

onEmpty

Value set when handle empty value

• Type: "null" | "undefined" | "empty" | "ignored"
• Default: ignored