BetaSu/big-react
Big React
This project is an educational React implementation tutorial and a concurrent rendering framework. It serves as a step-by-step demonstration of how to build a compatible library from scratch, featuring a virtual DOM engine for calculating element tree differences and a synthetic event system for cross-browser interaction consistency.
The framework implements a hook-based state manager to track local component data and share global context. It utilizes a concurrent rendering architecture that employs time-slicing and lane-based priorities to maintain main thread responsiveness during heavy updates.
The project covers a broad capability surface including component state management, the development of custom renderers decoupled from the browser, and the implementation of priority-based update scheduling. It also handles the synchronization of virtual trees to the browser document and the management of component side effects.
Features
- Concurrent Rendering Architectures - Implements a concurrent rendering architecture using time-slicing to prevent main thread blocking.
- React-Compatible Frameworks - Implements a complete, React-compatible framework from scratch, including virtual DOM and reconciliation logic.
- DOM Synchronization - Updates the browser document by inserting, moving, or deleting elements based on the virtual tree state.
- React Tutorials - Serves as a comprehensive educational tutorial on implementing a React-like library from the ground up.
- Component State and Effect Hooks - Manages local component state and lifecycle through a custom implementation of hooks.
- Lane-Based Priority Scheduling - Manages update execution by assigning priority levels to balance synchronous and asynchronous rendering.
- Hook State Storage - Uses linked-list structures to preserve component state across multiple render cycles via hooks.
- Update Schedulers - Prioritizes urgent user interactions by deferring non-critical UI updates via a scheduler.
- Concurrent Rendering Engines - Processes UI updates in the background using time-slicing to maintain main thread responsiveness.
- Component Local States - Provides a hook-based system for managing ephemeral state within individual UI components.
- Element Tree Caching - Uses structural object tree comparison to minimize memory allocation and DOM operations.
- Virtual DOM Reconciliation - Calculates the difference between virtual element trees to apply minimal updates to the browser document.
- Virtual DOM Engines - Features a virtual DOM engine that calculates element tree differences to apply the minimum necessary updates to the browser.
- Cross-Environment Rendering - Enables rendering to non-browser environments by decoupling reconciliation from the DOM.
- Custom Renderers - Implements a decoupled renderer architecture allowing the framework to target environments beyond the browser DOM.
- Component Context Sharing - Implements a shared provider system to propagate data through the component tree.
- Renderer Decoupling - Decouples the core reconciliation logic from the browser DOM to allow for custom environment renderers.
- Context-Based Dependency Injection - Implements a provider-based system to pass shared data through the component tree without prop drilling.
- User Event Handlers - Provides mechanisms for capturing and delegating user interactions across the component tree.
- Rendering Performance Optimizations - Optimizes render performance by skipping unnecessary re-renders and memoizing computations.
- Synthetic Event Systems - Provides a synthetic event system that normalizes cross-browser interactions through root-level delegation.
- Effect Schedulers - Schedules and executes asynchronous side-effect callbacks after the rendering phase.
Star history
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