> For the complete documentation index, see [llms.txt](https://docs.aurelia.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aurelia.io/developer-guides/error-messages/ui-virtualization/aur6000.md).

# AUR6000

## Error Message

`AUR6000: Horizontal virtual-repeat is not supported inside table elements (TABLE, TBODY, THEAD, TFOOT).`

## Description

This error occurs when `virtual-repeat` is configured for a horizontal layout (for example via CSS/strategy/layout) inside a table structure. Table layout rules and virtualization’s DOM measurements don’t work together reliably for horizontal virtualization.

## Example Trigger

```html
<!-- ❌ Avoid: virtual-repeat inside table elements -->
<table>
  <tbody>
    <tr virtual-repeat.for="item of items">
      <td>${item.name}</td>
    </tr>
  </tbody>
</table>
```

## Correct Usage

* Prefer non-table markup for horizontally virtualized lists (for example a `<div>`-based layout with `display: grid` or `flex`).
* If you must use a table, use vertical virtualization (or disable virtualization) and paginate instead.

## Troubleshooting

* Check where the `virtual-repeat` host element ends up in the DOM (the element that has `virtual-repeat.*`).
* If the host is inside `TABLE/TBODY/THEAD/TFOOT`, move the virtualized list outside the table, or change the layout strategy.


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