When you are building a social feed, data grid, or chat UI, everything feels fine with 10 mock items. Then you connect a real API, render 50,000 rows with myList.map(...), and the browser locks up. The core problem is simple: you are asking the DOM to do too much work. Virtualization solves this by rendering only what the user can actually see. Instead of mounting 50,000 nodes, you render the 15-20 items that are visible in the viewport, plus a small buffer.
scrollPaging is a lightweight jQuery plugin that adds infinite scroll functionality to your web pages. It automatically fetches content from an external data source via AJAX and appends it to the end of an existing container as the user scrolls. This creates a continuous browsing experience that loads more content on demand, without the need of writing complex pagination logic.