svelte/compose-with-tanstack-virtual

Virtualize TanStack Table rows in Svelte by wiring the virtualizer count to `table.getRowModel().rows.length`, rendering only `getVirtualItems()`, and positioning rows with CSS `translateY` transforms inside a fixed-height scroll container sized by `getTotalSize()`.

You can implement infinite scrolling with TanStack Virtual in Svelte by detecting when the user scrolls near the end of the visible virtual items and triggering a data fetch to load more rows into the underlying TanStack Table model.

Handle dynamic row heights in a Svelte virtual scroll by using the virtualizer's `measureElement` method and adding a `data-index` attribute to row elements, which allows accurate measurement of variable-height rows while guarding against Firefox measurement quirks.

TanStack Virtual supports horizontal column virtualization in Svelte tables by applying the same virtualization logic used for rows to the column axis, rendering only the visible columns within the scroll container.

Svelte tables become slow with thousands of rows because the full row model is rendered in the DOM; pairing TanStack Table with TanStack Virtual limits rendering to only the visible window, significantly improving scroll performance.