Greptile Overview

Greptile Summary

Added automatic page reload functionality to handle_frontend_exception for configurable error patterns. When frontend errors match entries in auto_reload_on_errors (currently targeting "TypeError: Cannot read properties of null"), the page automatically reloads once per configurable cooldown period (10 seconds) to clear spurious issues.

Key changes:

• Added auto_reload_on_errors ClassVar to configure which error messages trigger auto-reload
• Added auto_reload_cooldown_time_ms ClassVar (10 seconds) to prevent reload loops
• Modified handle_frontend_exception to yield an EventSpec that executes JavaScript to check sessionStorage and conditionally reload
• Import Iterator from collections.abc and call_script from reflex.event

Minor recommendations:

• Extract the sessionStorage key 'reflex_last_reloaded_on_error' into a constant
• Add human-readable comment for the cooldown duration (10000ms = 10 seconds)
• Update window.location.reload(true) to window.location.reload() as the boolean parameter is deprecated

Confidence Score: 4/5

• This PR is safe to merge with minor style improvements recommended
• The implementation is sound with proper cooldown logic to prevent reload loops. The changes are focused and well-documented. The three style comments are minor improvements (constant extraction, time duration comment, deprecated API usage) that don't affect functionality.
• No files require special attention

Important Files Changed

File Analysis

Sequence Diagram

sequenceDiagram
    participant Frontend
    participant FrontendEventExceptionState
    participant SessionStorage
    participant Browser
    
    Frontend->>FrontendEventExceptionState: handle_frontend_exception(info, component_stack)
    FrontendEventExceptionState->>FrontendEventExceptionState: Check if error matches auto_reload_on_errors
    alt Error matches and within cooldown
        FrontendEventExceptionState->>SessionStorage: Get 'reflex_last_reloaded_on_error'
        SessionStorage-->>FrontendEventExceptionState: Return last_reload timestamp
        FrontendEventExceptionState->>FrontendEventExceptionState: Check if (now - last_reload) > cooldown_time_ms
        alt Outside cooldown period
            FrontendEventExceptionState->>SessionStorage: Set 'reflex_last_reloaded_on_error' to now
            FrontendEventExceptionState->>Browser: Trigger window.location.reload()
            Browser->>Browser: Reload page
        end
    end
    FrontendEventExceptionState->>FrontendEventExceptionState: Call frontend_exception_handler(Exception(info))

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