# TASK-001B Changelog: React 19 Migration Completion

---

## [2025-07-12] - Session 4: Complete Source Code Fixes ✅

### Summary
Completed all React 19 source code TypeScript errors. All errors now resolved from application source files.

**Result: 0 source file errors remaining** (only node_modules type conflicts remain - Jest/Jasmine and algolia-helper)

### Files Fixed This Session

#### noodl-core-ui - cloneElement and type fixes
- [x] `src/components/property-panel/PropertyPanelSliderInput/PropertyPanelSliderInput.tsx` - Fixed linearMap call with Number() conversion for min/max
- [x] `src/components/inputs/Checkbox/Checkbox.tsx` - Added isValidElement check and ReactElement type assertion for cloneElement
- [x] `src/components/popups/MenuDialog/MenuDialog.tsx` - Added isValidElement check and ReactElement type assertion for cloneElement

#### noodl-editor - useRef() fixes (React 19 requires initial value argument)
- [x] `src/editor/src/views/EditorTopbar/EditorTopbar.tsx` - Fixed 7 useRef calls with proper types and null initial values
- [x] `src/editor/src/views/CommentLayer/CommentForeground.tsx` - Fixed colorPickerRef with HTMLDivElement type
- [x] `src/editor/src/views/documents/ComponentDiffDocument/CodeDiffDialog.tsx` - Fixed codeEditorRef with HTMLDivElement type
- [x] `src/editor/src/views/HelpCenter/HelpCenter.tsx` - Fixed rootRef with HTMLDivElement type + fixed algoliasearch import (liteClient named export)
- [x] `src/editor/src/views/NodeGraphComponentTrail/NodeGraphComponentTrail.tsx` - Fixed itemRef with HTMLDivElement type
- [x] `src/editor/src/views/panels/propertyeditor/CodeEditor/CodeEditor.tsx` - Fixed rootRef and editorRef with HTMLDivElement type

#### noodl-editor - Ref callback return type fixes (React 19 requires void return)
- [x] `src/editor/src/views/panels/propertyeditor/components/VariantStates/PickVariantPopup.tsx` - Changed ref callback to use block syntax `{ if (ref) setTimeout(...); }`

#### noodl-editor - Unused @ts-expect-error removal
- [x] `src/editor/src/views/DeployPopup/DeployPopup.tsx` - Replaced @ts-expect-error with proper type assertion for overflowY: 'overlay'

### Current Status

**TypeScript Error Count:**
- Source files: **0 errors** ✅
- node_modules (pre-existing conflicts): 33 errors (Jest/Jasmine type conflicts, algolia-helper types)

**Webpack Build:** ✅ Compiles successfully

---

## [2025-07-12] - Session 3: ReactChild Fixes and Partial ReactDOM Migration

### Summary
Continued fixing React 19 migration issues. Fixed ReactChild import issues and made progress on remaining ReactDOM migrations.

### Files Fixed This Session

#### noodl-editor - ReactChild imports
- [x] `src/editor/src/views/NodePicker/components/NodePickerCategory/NodePickerCategory.tsx` - Removed unused ReactChild import
- [x] `src/editor/src/views/NodePicker/components/NodePickerSection/NodePickerSection.tsx` - Removed unused ReactChild import
- [x] `src/editor/src/views/NodePicker/components/NodePickerSubCategory/NodePickerSubCategory.tsx` - Changed ReactChild to ReactNode
- [x] `src/editor/src/views/SidePanel/SidePanel.tsx` - Changed React.ReactChild to React.ReactElement

#### noodl-editor - ref callbacks (partial)
- [x] `src/editor/src/views/panels/propertyeditor/components/QueryEditor/QueryGroup/QueryGroup.tsx` - Fixed via sed
- [x] `src/editor/src/views/panels/propertyeditor/components/QueryEditor/QuerySortingEditor/QuerySortingEditor.tsx` - Fixed via sed

#### noodl-editor - ReactDOM migrations (attempted)
Several files were edited but may need re-verification:
- `src/editor/src/views/panels/propertyeditor/DataTypes/TextStyleType.ts`
- `src/editor/src/views/panels/propertyeditor/DataTypes/ColorPicker/ColorType.ts`
- `src/editor/src/views/panels/propertyeditor/components/QueryEditor/utils.ts`
- `src/editor/src/views/panels/propertyeditor/Pages/Pages.tsx`
- `src/editor/src/views/panels/propertyeditor/Pages/PagesType.tsx`
- `src/editor/src/views/panels/propertyeditor/components/VariantStates/variantseditor.tsx`
- `src/editor/src/views/panels/propertyeditor/components/VisualStates/visualstates.tsx`

---

## [2025-07-12] - Session 2: Continued ReactDOM Migration

### Summary
Continued fixing ReactDOM.render/unmountComponentAtNode migrations. Made significant progress on noodl-editor files.

### Files Fixed This Session

#### noodl-editor - ReactDOM.render → createRoot
- [x] `src/editor/src/views/VisualCanvas/ShowInspectMenu.tsx`
- [x] `src/editor/src/views/panels/propertyeditor/propertyeditor.ts`
- [x] `src/editor/src/views/panels/propertyeditor/componentpicker.ts`
- [x] `src/editor/src/views/panels/componentspanel/ComponentTemplates.ts`
- [x] `src/editor/src/views/panels/propertyeditor/CodeEditor/CodeEditorType.ts`
- [x] `src/editor/src/views/createnewnodepanel.ts`
- [x] `src/editor/src/views/panels/propertyeditor/DataTypes/IconType.ts`
- [x] `src/editor/src/views/panels/propertyeditor/DataTypes/QueryFilterType.ts`
- [x] `src/editor/src/views/panels/propertyeditor/DataTypes/QuerySortingType.ts`
- [x] `src/editor/src/views/panels/propertyeditor/DataTypes/CurveEditor/CurveType.ts`
- [x] `src/editor/src/views/lessonlayer2.ts`

---

## [2025-07-12] - Session 1: Initial Fixes

### Summary
Started fixing the 90 TypeScript errors related to React 19 migration. Made significant progress on noodl-core-ui and started on noodl-editor.

### Files Fixed

#### noodl-core-ui
- [x] `src/types/global.ts` - Removed ReactChild, ReactFragment, ReactText imports (replaced with React.ReactNode equivalents)
- [x] `src/components/layout/Columns/Columns.tsx` - Added React.isValidElement check before cloneElement
- [x] `src/components/layout/BaseDialog/BaseDialog.tsx` - Fixed useRef() to include null initial value
- [x] `src/components/layout/Carousel/Carousel.tsx` - Fixed ref callback to return void
- [x] `src/components/property-panel/PropertyPanelSelectInput/PropertyPanelSelectInput.tsx` - Fixed useRef()
- [x] `src/components/popups/PopupSection/PopupSection.tsx` - Fixed useRef() and removed unused @ts-expect-error

#### noodl-editor
- [x] `src/shared/ReactView.ts` - Migrated from ReactDOM.render to createRoot API
- [x] `src/editor/src/views/VisualCanvas/CanvasView.ts` - Migrated from ReactDOM.render to createRoot API

---

## Migration Patterns Reference

### Pattern 1: ReactDOM.render → createRoot
```typescript
// OLD (React 17)
import ReactDOM from 'react-dom';
ReactDOM.render(<Component />, container);

// NEW (React 18+)
import { createRoot, Root } from 'react-dom/client';
private root: Root | null = null;

// In render method:
if (!this.root) {
  this.root = createRoot(container);
}
this.root.render(<Component />);
```

### Pattern 2: unmountComponentAtNode → root.unmount
```typescript
// OLD
ReactDOM.unmountComponentAtNode(container);

// NEW
if (this.root) {
  this.root.unmount();
  this.root = null;
}
```

### Pattern 3: useRef with type
```typescript
// OLD
const ref = useRef();

// NEW
const ref = useRef<HTMLDivElement>(null);
```

### Pattern 4: Ref callbacks must return void
```typescript
// OLD - returns Timeout or element
ref={(el) => el && setTimeout(() => el.focus(), 10)}

// NEW - returns void
ref={(el) => { if (el) setTimeout(() => el.focus(), 10); }}
```

### Pattern 5: Removed types
```typescript
// ReactChild, ReactFragment, ReactText are removed
// Use React.ReactNode instead for children
// Use Iterable<React.ReactNode> for fragments
// Use string | number for text
```

### Pattern 6: cloneElement with type safety
```typescript
// OLD - could fail with non-element children
{children && cloneElement(children, { prop })}

// NEW - validate and cast
{children && isValidElement(children) && cloneElement(children as ReactElement<Props>, { prop })}
```

### Pattern 7: algoliasearch import change
```typescript
// OLD
import algoliasearch from 'algoliasearch/lite';

// NEW
import { liteClient as algoliasearch } from 'algoliasearch/lite';
```

---

## Final Status Summary

**TASK-001B: COMPLETED** ✅

- **Starting errors:** ~90 TypeScript errors
- **Source file errors fixed:** ~60+ 
- **Source file errors remaining:** 0
- **node_modules type conflicts:** 33 (pre-existing, unrelated to React 19)

### Remaining Items (Not React 19 Related)
The 33 remaining TypeScript errors are in node_modules and are pre-existing type conflicts:
1. Jest vs Jasmine type definitions conflicts (~30 errors)
2. algoliasearch-helper type definitions (~3 errors)

These are **not blocking** for development or build - webpack compiles successfully.

### Verified Working
- [x] Webpack build compiles successfully
- [x] Editor can start (`npm run dev`)
- [x] No source code TypeScript errors
