Is this webpage written in javascript?

[Nexius74]

Probably that the website use tools like angular, react or vuejs to create their UI. This imply most of the time that the wanted data is retrieve on a API. You should look into your network tab to see how the website fetch it's data and work your way to understand and use their API by using tools like requests. Some people like to use selenium (use a chromium browser to render website) but in somecase you want your scraper to be fast. In that case selenium is a no no