Hardcoding API keys, endpoints, and configuration values directly in your React code creates security risks and makes switching between development and production environments difficult. With over 12 years of React development experience since 2014 and as the creator of CoreUI, I’ve configured environment variables for countless production applications. React supports environment variables through .env files that are loaded at build time, with variables prefixed with REACT_APP_ automatically exposed to your application. This approach keeps sensitive data out of version control and allows different configurations per environment.

Managing separate configurations for development and production is crucial for Angular applications with different API endpoints, feature flags, and debug settings. As the creator of CoreUI with over 11 years of Angular development experience since 2014, I’ve configured production deployments for countless enterprise applications. The most effective solution is to use Angular’s environment file replacement system that automatically swaps configurations during build. This approach ensures clean separation between environments without manual configuration changes.

Managing environment-specific configuration is essential for Angular applications deployed across development, staging, and production environments. As the creator of CoreUI with over 11 years of Angular development experience since 2014, I’ve configured countless enterprise applications for multiple environments. The most effective solution is to use Angular’s environment files to store configuration variables that change between environments. This approach keeps sensitive data out of your codebase and makes deployment straightforward.

Managing configuration and sensitive data through environment variables is essential for secure and flexible Node.js applications across different deployment environments. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented environment variable management in numerous Node.js backend services for API keys, database connections, and deployment-specific configurations. From my expertise, the most secure approach is to use process.env with the dotenv package for local development. This method keeps sensitive data out of source code while providing easy configuration management across development, staging, and production environments.