virtual-lists

Large lists render smoothly by applying windowing, a technique that renders only the items visible in the viewport. This dramatically reduces layout churn and improves scrolling responsiveness for lists with hundreds or thousands of items.

Windowing optimizes frontend performance for huge data tables by selectively rendering only visible rows. This prevents slow initial renders and jank during scrolling when displaying hundreds or thousands of items.

Yes, windowing supports lists with variable item heights. You can choose appropriate list types like FixedSizeList or VariableSizeList to integrate with virtualization libraries and maintain smooth scrolling.

Windowing works effectively for rendering long chat histories in web UIs. By rendering only the visible portion of the feed, it prevents the performance degradation common with massive list rendering.

You should implement virtualization for list rendering when your web UI contains hundreds to thousands of items. It is necessary when initial renders slow down or scrolling jank appears due to layout churn.