Or an idea how this can be easily achieved?
It's about the best way to smooth scrolling long lists on the web page.
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Scroller is a virtual rendering plug-in for DataTables which allows large datasets to be drawn on screen very quickly. What the virtual rendering means is that only the visible portion of the table (and a bit to either side to make the scrolling smooth) is drawn, while the scrolling container gives the visual impression that the whole table is visible.