configure .env file in javascript

To configure a .env file in a Node.js project using Javascript, you can follow these steps:

1. Install dotenv package:

index.tsx
npm install dotenv
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2. Create a .env file in the root of your project directory.

3. Add your environment variables to the .env file in KEY=VALUE format:

index.tsx
PORT=3000
DB_URL=localhost:27017/mydb
SECRET_KEY=abc123
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4. Load the environment variables in your Javascript code using the dotenv package:

index.tsx
require('dotenv').config()
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5. You can now access your environment variables within your node application using process.env.KEY. For example:

index.tsx
const port = process.env.PORT || 3000;
const dbUrl = process.env.DB_URL;
const secretKey = process.env.SECRET_KEY;
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In the above code snippet, we're accessing the environment variables PORT, DB_URL, and SECRET_KEY using process.env. We've also set a default value for PORT in case it's not defined in the .env file.

Note: It's important to add the .env file to your .gitignore file, so that you don't accidentally commit sensitive information to version control.