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PerformanceObserver accepts invalid callbacks until delivery #58238
Description
Description
PerformanceObserver stores its constructor argument without validating that one was supplied or that it is callable. Missing, null, and other non-function callbacks therefore create invalid observer instances and fail only later when native delivery attempts to invoke the value.
Expected behavior
Construction without the required argument should throw synchronously, and an explicitly supplied non-function should throw the corresponding callback type error, matching the PerformanceObserver API contract.
React Native Version
0.87.1 and current main
Affected Platforms
New Architecture - All
Activity
react-native-bot commentedon Aug 30, 2026
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react-native-bot commentedon Sep 24, 2026
This issue is waiting for author's feedback since 24 days. Please provide the requested feedback or this will be closed in 7 days.
react-native-bot commentedon Oct 1, 2026
This issue was closed because it has been stalled for 7 days with no activity.
react-native-bot commentedon Oct 1, 2026
This issue was closed because the author hasn't provided the requested feedback after 7 days.
Validate PerformanceObserver callbacks (#58239)