What is windowing technique?

Web Development
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Windowing is a technique that only renders a small subset of our rows at any given time, and can dramatically reduce the time it takes to re-render the components as well as the number of DOM nodes created. If our application renders long lists of data then this technique is recommended. Both react-window and react-virtualized are popular windowing libraries which provides several reusable components for displaying lists, grids, and tabular data.