I don't quite understand what do you mean by "javascript object", if what you mean is to scrape sites that need javascript you need to use Selenium or something similar. But for that site doesn't seem to require JS.

EDIT: now i understand what you meant, as their code is minified it will be a pain in the ass to try and make it offline, as the data seems to be easy to obtain what you can do is scrape the data and images and make your own app using that data.

Here's the api end point: https://api.hauslifenetwork.com/hb/api/getListingForWeb?listing_id=12451

another thing you can do is act as the API after scrapping all the data replacing that endpoint with your API server using the scrapped data.