.env.dev

MY_NAME=nitish

.env.prod

MY_NAME=sophie

README.md

Hacking dotenv

testing

npm i

ENV_FILE=.env.dev node test.js
ENV_FILE=.env.prod node test.js

package.json

{
  "name": "nitish",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "dotenv": "^16.0.3"
  }
}

test.js

require('dotenv').config({
    path: process.env?.ENV_FILE ? process.env?.ENV_FILE : '.env.dev'
});

console.log (process.env?.MY_NAME);