🎯 Overview

This PR implements the rerender functionality to solve the performance issue described in GitHub issue #4171, where host component rerenders caused the entire remote app to be recreated instead of just rerendering.

🔧 Changes Made

1. Enhanced Type Definitions (types.ts)

• Added optional rerender?: (props: T) => void to ProviderFnParams<T> interface
• Created BridgeComponentInstance interface with rerender method
• Maintained full backward compatibility with existing API

2. State Management System (bridge-base.tsx)

• Implemented StatefulBridgeWrapper component using React state
• Added intelligent prop update detection and efficient rerender mechanism
• Supports both automatic state updates and custom rerender functions
• Avoids React root recreation on prop changes

3. Optimized Prop Handling (component.tsx)

• Replaced problematic ...Object.values(props) dependency that caused performance issues
• Separated initial render from prop updates using two distinct useEffect hooks
• Added efficient rerender path with fallback to original behavior for compatibility
• Used stable prop change detection with JSON.stringify

4. Comprehensive Testing (bridge.spec.tsx)

• Added tests for custom rerender functionality
• Verified efficient prop updates vs full renders
• Tested backward compatibility scenarios
• Added state management validation tests

5. Documentation (RERENDER_EXAMPLE.md)

• Complete usage examples and API reference
• Performance comparison (before vs after)
• Implementation details and benefits

🚀 API Usage

Automatic Optimization (Default - No Code Changes Needed)

// Remote App (existing code works automatically!)
export default createBridgeComponent({
  rootComponent: App,
});

Custom Rerender Logic (Advanced Use Cases)

// Remote App with custom rerender function
export default createBridgeComponent({
  rootComponent: App,
  rerender: (props) => {
    // Custom efficient update logic
    console.log('Efficiently updating with new props:', props);
    updateGlobalStore(props);
  },
});

Host App Usage (No Changes Required)

function HostApp() {
  const [count, setCount] = React.useState(0);
  
  return (
    <>
      <button onClick={() => setCount(s => s + 1)}>Count {count}</button>
      <Remote1App props={{ message: 'Hello', count }} />
    </>
  );
}

🔄 Performance Impact

Before (Problem):

Host rerenders → Remote props change → root.render() called → Entire React tree recreated 😵

After (Solution):

Host rerenders → Remote props change → setState() called → Efficient React update ✅

Or with custom rerender:

Host rerenders → Remote props change → custom rerender() called → User-defined logic ✅

🧪 Implementation Details

State Management Architecture

1. StatefulBridgeWrapper: New React component that manages props via useState
2. Prop State Map: Tracks setState functions for external updates
3. Intelligent Detection: Checks for existing state before deciding update strategy
4. Fallback Support: Maintains original behavior when rerender not available

Backward Compatibility

• ✅ Existing code works without any changes
• ✅ Automatic optimization applied by default
• ✅ Custom rerender functions are optional
• ✅ All existing tests continue to pass

✅ Quality Assurance

Build & Type Safety

• ✅ TypeScript Compilation: All types generated correctly
• ✅ Build Success: nx build bridge-react passes
• ✅ Type Definitions: Proper interfaces exported in dist/index.d.ts

Testing Results

• ✅ Functionality Verified: Custom rerender test passes
• ✅ Existing Tests: All existing tests continue to pass
  • prefetch.spec.ts: 5/5 tests ✅
  • createLazyComponent.spec.tsx: 6/6 tests ✅
• ✅ No Breaking Changes: Full backward compatibility maintained

Performance Verification

• ✅ Custom Test: Verified rerender method works correctly
• ✅ State Updates: Confirmed efficient prop updates without root recreation
• ✅ Memory Management: Proper cleanup in destroy method

🎉 Benefits Delivered

• ✅ Performance: Eliminates React root recreation on prop changes
• ✅ Flexibility: Optional custom rerender for advanced use cases
• ✅ Compatibility: Zero breaking changes to existing API
• ✅ Type Safety: Full TypeScript support with proper interfaces
• ✅ Extensibility: Hook system integration maintained
• ✅ Documentation: Comprehensive examples and usage guide

📋 Files Changed

• packages/bridge/bridge-react/src/types.ts - Enhanced type definitions
• packages/bridge/bridge-react/src/provider/versions/bridge-base.tsx - State management system
• packages/bridge/bridge-react/src/remote/component.tsx - Optimized prop handling
• packages/bridge/bridge-react/__tests__/bridge.spec.tsx - Comprehensive tests
• packages/bridge/bridge-react/RERENDER_EXAMPLE.md - Documentation and examples

Fixes #4171