Leipzig.js #3 (Hybrid) - How Service Injection Fixes React's Broken Architecture

Описание: React's current architectural patterns fail to scale beyond medium-complexity applications due to fundamental issues with hooks-based state management, prop drilling, and lack of clear separation of concerns. This talk presents React Service Injection (RSI) as a paradigm shift that eliminates these scaling problems by introducing compile-time dependency injection and service-oriented architecture to React applications.

The core problem lies in React's conflation of UI rendering with business logic and state management. Components become coupled to data sources, testing requires complex mock setups, and architectural boundaries dissolve as applications grow. Traditional solutions like Redux and modern alternatives like Zustand add complexity without solving the underlying coupling issues.

RSI addresses these problems through two key technologies: TDI2 (TypeScript Dependency Injection) for compile-time dependency injection and Valtio for reactive state management. This combination enables components to become pure templates while business logic resides in injectable services. The approach eliminates props drilling and hooks complexity entirely, provides automatic cross-component synchronization, and enables enterprise-grade testing patterns familiar to backend and Angular developers.

The talk demonstrates RSI through prepared code examples, transforming React's official useEffect patterns into service-based alternatives. The architectural approach draws from proven backend patterns including repository, service, and adapter layers while maintaining React's component model.

Results indicate significant improvements in code organization, testing simplicity, and team scalability. The pattern enables interface-driven development, SOLID principle compliance, and clear architectural boundaries previously impossible in React applications. Early adoption suggests this approach could represent React's evolution from view library to application framework.