if (typeof window !== 'undefined') {
window.Hyperstack = { hotloader: function(port, ping) { Opal.Hyperstack.$const_get('Hotloader').$listen(port || 25222, ping || Opal.nil) } }
} else {
throw 'Attempt to run hotloader during prerendering - make sure you import with the `client_only: true` option'
}