Greptile Overview

Summary

Fixed memoization issue where WindowEventListener event handlers weren't properly memoized when used inside memoized components.

Key Changes:

• Added hooks field to store memoized event trigger hooks from StatefulComponent._fix_event_triggers()
• Overrode create() method to call _fix_event_triggers() and store resulting hooks
• Modified add_hooks() to merge stored memoized hooks with generated useEffect hooks
• Changed event handler wrapping in useEffect: const fn = {Var.create(event_trigger)} ensures proper variable creation
• Removed _var_type="str" from Var creation in hooks (now inferred correctly)

How It Works:
When WindowEventListener is created, _fix_event_triggers() processes all event handlers through StatefulComponent's memoization logic, generating useCallback hooks. These are stored and then merged with the useEffect hooks that register window event listeners, ensuring stable function references across re-renders.

Confidence Score: 4/5

• Safe to merge with minimal risk - fix follows established patterns
• Implementation correctly applies the memoization pattern used elsewhere in the codebase (Upload, Match components). The fix properly wraps event triggers using Var.create() and stores memoized hooks. Minor concern is the change from explicit _var_type to inferred typing, but this aligns with the framework's typing system.
• No files require special attention

Important Files Changed

File Analysis

Sequence Diagram

sequenceDiagram
    participant User as Developer
    participant WEL as WindowEventListener
    participant SC as StatefulComponent
    participant Compiler as Compiler
    participant Browser as Runtime

    User->>WEL: create with event handler
    WEL->>SC: _fix_event_triggers
    SC->>SC: Generate memoized triggers
    SC-->>WEL: Return hooks list
    WEL->>WEL: Store hooks
    WEL-->>User: Component ready

    Compiler->>WEL: add_hooks
    WEL->>WEL: Merge stored hooks
    WEL->>WEL: Generate useEffect for events
    WEL-->>Compiler: Return hooks

    Compiler->>Browser: Emit React code
    Browser->>Browser: useCallback executed
    Browser->>Browser: useEffect executed
    Browser->>Browser: addEventListener

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