To solidify the difference, keep this quick comparison in mind: .env.production .env.local.production Contains Secrets? No (Only public/default configs) Yes (Private keys, DB passwords) Scope Shared across the entire development team Unique to your machine or a specific server Priority Higher (Overrides .env.production )
Sometimes you need environments beyond development , production , and test , such as staging or qa . Most frameworks support this by allowing you to set NODE_ENV to your custom mode.
DATABASE_URL=postgres://user:pass@localhost:5432/db API_KEY=your-api-key-here DEBUG=false
This is why .env.production.local is so powerful—it can override any variable set in any other file, making it ideal for a temporary production-like test on your local machine.
You attempt to log process.env.DATABASE_URL in a React component, but it's undefined .
To solidify the difference, keep this quick comparison in mind: .env.production .env.local.production Contains Secrets? No (Only public/default configs) Yes (Private keys, DB passwords) Scope Shared across the entire development team Unique to your machine or a specific server Priority Higher (Overrides .env.production )
Sometimes you need environments beyond development , production , and test , such as staging or qa . Most frameworks support this by allowing you to set NODE_ENV to your custom mode.
DATABASE_URL=postgres://user:pass@localhost:5432/db API_KEY=your-api-key-here DEBUG=false
This is why .env.production.local is so powerful—it can override any variable set in any other file, making it ideal for a temporary production-like test on your local machine.
You attempt to log process.env.DATABASE_URL in a React component, but it's undefined .
