So I have an .env file with api key inside of it:

API_KEY = {apikey}

And I'm trying to use it in app.js file:

const API_KEY = process.env.API_KEY;

console.log(API_KEY);

And I get the next error:

Uncaught ReferenceError: process is not defined

I'm not using node.js so I guess there's some way it couldn't work.