Proof

react-native-exception-handler

the JavaScript exception handler works, but the native exception handler is a noop while native exceptions are observable in the reference iOS simulator

50%

API coverage

No visual proof cases have been published for this package yet. The registry summary below describes what the compat layer implements.

Working (5)

real upstream JS module running from the bundlesetJSExceptionHandler (validates arg types, gates on __DEV__/allowedInDevMode, installs via global.ErrorUtils.setGlobalHandler)getJSExceptionHandler (via global.ErrorUtils.getGlobalHandler)console.error rerouting through ErrorUtils.reportErrorsetNativeExceptionHandler shape (Platform.OS-aware arg-count branch resolves to the same no-op registration)

Missing

real native-crash interception (no browser equivalent — canvas worker can't observe C++/Objective-C exceptions). apps that depend on JS-only error reporting (Sentry, custom reporters) get full coverage; apps that need native-crash dumps need a different path on web.