The original commenter was creating the object at log-time, though, which means it wouldn't be shared by anything else. Unless x or y is an object, but in that

The original commenter was creating the object at log-time, though, which means it wouldn't be shared by anything else. Unless x or y is an object, but in that case the issue is completely tangential to the original suggestion And anyway- JSON.parse(JSON.stringify(x)) would be preferable because you'd still get the browser's rich object exploration