blanca_Jacobs94 answered on March 23rd 20 at 19:17
Here is just the rest of the code is filled with js. Specifically, in the example from the screenshot works Angular.
Josephine.Zieme answered on March 23rd 20 at 19:19
Read more about SPA (single page application) , in this example, the whole layout is being rendered on the client side. Not good for search engines, so there is a SSR (server side rendering), read about it, and the questions will disappear)