{#each virtualizer.items as row (row.key)}
{#if row.index < rowCount}
{@const startItemIndex = row.index * columns}
{@const endItemIndex = Math.min(startItemIndex + columns, items.length)}
{#each Array.from({ length: endItemIndex - startItemIndex }) as _, colIndex (startItemIndex + colIndex)}
{@const itemIndex = startItemIndex + colIndex}
{#if colIndex === 0}
{#if itemIndex < items.length}
{@render children({
item: items[itemIndex],
index: itemIndex,
isFullyVisible: row.isFullyVisible,
isPartiallyVisible: row.isPartiallyVisible,
proximity: row.proximity,
})}
{/if}
{:else}
{#if itemIndex < items.length}
{@render children({
item: items[itemIndex],
index: itemIndex,
isFullyVisible: row.isFullyVisible,
isPartiallyVisible: row.isPartiallyVisible,
proximity: row.proximity,
})}
{/if}
{/if}
{/each}
{/if}
{/each}
{/snippet}
{#if useWindowScroll}