In frameworks like Next.js, the environment loader looks for variables in a specific order of priority: process.env (System environment variables) .env.development.local (Local overrides) .env.local (General local overrides) .env.development (Development-specific defaults) .env (Global defaults) Conclusion
The .env.development.local file is a specialized environment variable file used primarily in modern web development frameworks like Next.js and Create React App . It is designed to allow developers to set configuration values that apply specifically to their development environment . Core Purpose .env.development.local
"type": "node", "request": "launch", "name": "Launch with .env.development.local", "envFile": "$workspaceFolder/.env.development.local" In frameworks like Next
: Use it for settings that only apply to your individual machine, such as a local database password or a personal API key that shouldn't be shared with the rest of the team. : Because it contains sensitive local data, it must never be committed to version control (Git). Ensure it is listed in your .gitignore Comparison and Load Order When running your application in development mode ( NODE_ENV=development : Because it contains sensitive local data, it
VITE_API_URL=http://localhost:8080 VITE_ENABLE_MOCKS=true
You must prefix variables with VITE_ to expose them to the client.