React Inject Env

react-inject-env is a specialized build-time utility for React applications that enables the injection of environment variables *after* the static files have been built. This addresses a common challenge in React development where `process.env` variables are typically bundled into the application at build time, preventing a single build artifact from being used across multiple deployment environments without rebuilding. The current stable version is 2.1.0. The library works by generating a `env.js` file (or custom name) in your build output, which then exposes variables via `window.env` at runtime. Key differentiators include its ability to modify environment variables without rebuilding the application, synchronous access to these variables (unlike some asynchronous loading solutions), and straightforward integration into CI/CD pipelines and Docker workflows. It supports `.env` files and command-line arguments for variable definition, with command-line variables taking precedence. This approach significantly simplifies multi-environment deployments.