On the React Native, window global is exist but there is no location and hostname properties on that global, so typeof window !== 'undefined' checking is not working in React Native, and headers['X-Frappe-Site-Name'] = window.location.hostname; line throws error.
So I added another check as typeof document !== 'undefined' that understand better if it is browser or React Native environment
On the React Native,
windowglobal is exist but there is nolocationandhostnameproperties on that global, sotypeof window !== 'undefined'checking is not working in React Native, andheaders['X-Frappe-Site-Name'] = window.location.hostname;line throws error.So I added another check as
typeof document !== 'undefined'that understand better if it is browser or React Native environment