How to connect process.env to a node application so that variables can be set through the console?

Question

Node.js

I read about process.env, but I didn’t quite understand how it works
. I have an installed application with npm and I run it through the console npx playwright test
. Can I somehow specify the value for the variables in the console in this launch?
It seems that I stumbled upon process.env, but I could not quite understand if it can be used anywhere and how to do it?

Answer 1

MY_VAR="Hello world" node my-script.js

// my-script.js
console.log(process.env.MY_VAR) //Hello world

MY_VAR="Hello world" npx playwright test
Not sure, but in theory it should work. And it's easiest to store everything in .env files

Answer 2

process.argv or use dotenv