.env.development.local

Tools like Next.js follow a strict load order to determine which variable takes precedence. Generally, the more specific a file is, the higher its priority:

: If you are running a local instance of MongoDB or PostgreSQL, you can define your DATABASE_URL here. .env.development.local

: Safely enable experimental features on your machine without forcing them on other developers. Best Practices Environment variables - Vercel Tools like Next

: It is designed to override default settings found in .env or .env.development . the more specific a file is

The .env.development.local file is a specialized environment variable file used to store configuration settings and sensitive information (like API keys or database credentials) specifically for a developer's during the development phase . Its primary characteristics include: