How do I set up environment variables in Node.js?

How do I set up environment variables in Node.js?

You can set up environment variables in Node.js using the process.env object. You can define them in a .env file and use the dotenv package to load them.

What is the purpose of using a .env file?

.env files help you manage environment-specific settings, keeping sensitive information like API keys out of your code.

Can you show me an example of a .env file?

Sure! A simple .env file might look like this:

DB_HOST=localhost
DB_USER=root
DB_PASS=password

How do I access these variables in my code?

You can access them using process.env.DB_HOST, process.env.DB_USER, and process.env.DB_PASS in your Node.js application.