Uploading images to image galleries on react+redux if serverside rendering is used?

Question

React

I want to make a gallery with pictures, and accordingly, when you scroll down, so that they are loaded, like in a tumblr archive for example. If I use server rendering with react + redux, how will the page be rendered, if I open the page, and initially it has an array with urls for images (this is the initial array), and then when I scroll down the page, the application requests another array with image urls? Will the page be re-rendered on the server with all the new pictures? Or will it be updated on the client? It would probably be more correct for the page on the client to request an array with urls and on the client to add new elements with pictures... But what will happen in this case?