re: Loading environment variables in JS apps VIEW POST

re: Hi there, nice article. Just have a quick question. Does the dotenv script load the entire .env file into the client side? If that's the case t...

Hi Muhammad! The entire .env file is indeed loaded, so all the secrets (including database passwords, in your case) will be exposed on the client, if that's where your app is running. This would obviously be a huge problem in a production environment, but my use case was centered around local development.

Security depends heavily on your deployment pipeline and the kind of system you're building, and I don't want to go too deep on that topic in a comment, but I'll leave you with two things:

  1. If you're developing a client-side app, it should be making calls to an API, not a database. This way, even if the API key is leaked, you can control security by making the API read-only or having a strict CORS policy.
  2. You could use the code below to make sure your client-side app doesn't expose secrets:
if (process.env.NODE_ENV !== 'production') {

Hope this answers your question!


I see. I was thinking of using this in production in my current client's app. Thanks for pointing this out.

Dodged a bullet there.

Code of Conduct Report abuse