.env.development.local

To get the most out of .env.development.local , follow these best practices:

: Unlike standard .env files that might be shared, .env.development.local should never be checked into version control (Git). Loading Priority (Hierarchy)

.env.local .env.*.local

In short, .env.development.local is the file with the final say for your local development needs, safe from accidental sharing and scoped to your dev environment. .env.development.local

Remember that CRA (React) requires REACT_APP_ , Vite requires VITE_ , and Next.js exposes all by default. Using the wrong prefix is the #1 reason environment variables appear undefined .

By using .env.development.local , a developer can test features with their own unique database string or API key without affecting the rest of the team's shared .env.development file. Key Use Cases

However, for local development, you want to use a different API key or endpoint. In your .env.development.local file, you can add: To get the most out of

Because .env.development.local is loaded last, it takes precedence over all other variables, making it perfect for personalizing your local setup. Why Use .env.development.local ?

: It is intended for values that are specific to a single developer's machine (e.g., a local database password or a private API key).

Show you how to set up prettier and eslint for cleaner code. Using the wrong prefix is the #1 reason

# ----------------------------------------------------------- # Authentication & Security # ----------------------------------------------------------- # Generate a secure random string for sessions (e.g., using openssl rand -hex 32) SESSION_SECRET=do_not_use_this_in_production_replace_me JWT_SECRET=local_dev_jwt_secret_key

(Highest priority for local dev overrides)

(Local overrides specifically for development)

// Access the DATABASE_URL variable in any Node.js environment const dbUrl = process.env.DATABASE_URL;

), frameworks typically load files in this order, with later files overriding earlier ones: (Default/Fallback) .env.development (Shared dev defaults) .env.local (General local overrides) .env.development.local (Specific local dev overrides) Review Checklist Git Status : Confirm the file is not tracked by Git. Run git check-ignore .env.development.local to verify. Sensitive Data