warning and error is not fatal ?

[ibra4]

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Im using this code in my app.

const errorHandler = async (error, isFatal) => {
  console.log(error, isFatal)
  sendCrashToLogger()
  if (isFatal) {
    RNRestart.Restart()
  }
}

setNativeExceptionHandler(errorHandler);
setJSExceptionHandler(errorHandler, true);

• "ReferenceError: Can't find variable: useForm This error is located at" -> isFatal for this error is false
• "Warning: Can't perform a React state update on an unmounted component" -> isFatal for this warning is false

the first error breaks the application while the second not.

Is there any way to determine whether the error breaks the app or not?