fix: failsafe JavaScript event emitter notifyListeners#3695
fix: failsafe JavaScript event emitter notifyListeners#3695leaanthony merged 3 commits intowailsapp:masterfrom
notifyListeners#3695Conversation
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Files selected for processing (3)
- v2/internal/frontend/runtime/desktop/events.js (1 hunks)
- v2/internal/frontend/runtime/runtime_debug_desktop.js (1 hunks)
- website/src/pages/changelog.mdx (1 hunks)
Additional comments not posted (4)
v2/internal/frontend/runtime/desktop/events.js (1)
93-94: LGTM! Verify the usage ofnotifyListeners.The changes to use a shallow copy and optional chaining are correct and improve the function's robustness against race conditions.
Ensure that the usage of
notifyListenersthroughout the codebase aligns with these changes.Verification successful
Usage of
notifyListenersis consistent and correct.The function
notifyListenersis used in multiple places within the codebase, and the changes to use a shallow copy and optional chaining are properly implemented. No issues were found regarding its usage.
v2/internal/frontend/runtime/runtime_debug_desktop.js: The function is used consistently with the new implementation.v2/internal/frontend/runtime/desktop/events.js: The function is correctly updated and used.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of `notifyListeners` to ensure compatibility with the changes. # Test: Search for the function usage. Expect: No issues with the new implementation. rg --type javascript -A 5 $'notifyListeners'Length of output: 78
Script:
#!/bin/bash # Description: Verify the usage of `notifyListeners` to ensure compatibility with the changes. # Test: Search for the function usage. Expect: No issues with the new implementation. rg -A 5 'notifyListeners'Length of output: 3302
website/src/pages/changelog.mdx (1)
26-26: Changelog entry approved.The entry for fixing the
notifyListeners()race condition is clear and provides a useful reference to the related pull request.v2/internal/frontend/runtime/runtime_debug_desktop.js (2)
86-89: LGTM! Optional chaining and shallow copy enhance robustness.The use of optional chaining with
?.and creating a shallow copy of the listener list withslice()ensures that the code handles undefined lists gracefully, preventing potential runtime errors.
Line range hint
87-99: Verify listener list update logic.Ensure that the logic correctly updates the
eventListenersarray after processing. The splice operation onnewEventListenerListshould not affect the original list unless reassigned.Verification successful
Listener list update logic is correctly implemented.
The
eventListeners[eventName]is correctly reassigned after processing, ensuring that the modifications tonewEventListenerListare properly applied. This confirms that the splice operation does not affect the original list unless reassigned, which is handled correctly in the code.
- The line
eventListeners[eventName] = newEventListenerList;confirms the correct update logic.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that the `eventListeners` array is correctly updated after processing in `notifyListeners`. # Test: Search for the assignment to `eventListeners[eventName]` after processing. rg --type javascript -A 5 $'eventListeners[eventName] = 'Length of output: 93
Script:
#!/bin/bash # Description: Verify that the `eventListeners` array is correctly updated after processing in `notifyListeners`. # Find all JavaScript files and search for the assignment to `eventListeners[eventName]` after processing. fd -e js | xargs rg -A 5 'eventListeners\[eventName\] = 'Length of output: 3042
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* fix: failsafe JavaScript event emitter `notifyListeners` * chore: update change log
2 participants
Description
Failsafe JavaScript event emitter
v2/internal/frontend/runtime/desktop/events.js:notifyListeners()Fixes #3694
Type of change
Please delete options that are not relevant.
How Has This Been Tested?
Locally with following steps:
runtime.EventsOn()on the frontendruntime.EventsEmit()runtime.EventsOf()Test Configuration
Checklist:
website/src/pages/changelog.mdxwith details of this PRI have commented my code, particularly in hard-to-understand areasI have made corresponding changes to the documentationI have added tests that prove my fix is effective or that my feature worksSummary by CodeRabbit
Bug Fixes
Improvements