.env.development | //top\\

This ensures your .env.development is validated before the app starts.

.env.development is an environment file that stores variables for your development environment (e.g., localhost ). It is commonly used with libraries like dotenv (Node.js) or frameworks like React (CRA), Vue, and Next.js. .env.development

automatically load this specific file when you run commands like npm run dev This ensures your

Based on the benefits and best practices outlined in this paper, we recommend the following: .env.development

Most frameworks load .env.local of .env.development , merging and overriding. This is a clean, conflict-free system.

The primary utility of .env.development is the separation of configuration from code.