Wrong code in error handling chapter "Error handling, try catch"

There is a wrong code in the Error Handling chapter. Refer to the image and code below:

try {
  user = { /*...*/ };
} catch (err) {
  if (err instanceof ReferenceError) {
    alert('ReferenceError'); // "ReferenceError" for accessing an undefined variable
  }
}

This should output as follows in a browser environment.

and, nothing should be there in the terminal in Node js env. as nothing is being returned or logged.
But, as per the website when you ran the code, it shows this:

For reference it's the second code snippet under: https://javascript.info/try-catch#rethrowing

It might be using "use strict" internally, but its quite misleading.

Abra o capítulo Error Handling no segundo trecho de código sob “Rethrowing” e execute o exemplo mostrado em um navegador e no Node.js. Compare a saída observada com as capturas de tela da issue e, em seguida, corrija o trecho ou sua explicação para que o comportamento documentado corresponda em ambos os ambientes.