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Environment Variables

Environment variables are key-value pairs used to configure your application without hardcoding sensitive or environment-specific data. They are typically defined in .env files or through deployment settings.

Purpose​

  • Store secrets, API keys, and configuration values securely.
  • Support different settings for development, staging, and production.
  • Keep sensitive data out of source code.

Example​

# .env.local
NEXT_PUBLIC_API_URL=https://api.example.com
NEXT_PUBLIC_AUTH_ENABLED=true

Access environment variables in your code using process.env (Node.js) or framework-specific methods.