---
url: "https://vueda.dev/v3/reference/api/vue/ComboboxVirtualizer.md"
title: "ComboboxVirtualizer"
---

# ComboboxVirtualizer

## Overview

Virtualizes the list of items inside ComboboxViewport for large datasets.
Requires manual filtering of options before passing them in.

Uses a render function (not a template) to pass slots directly to reka-ui's
ComboboxVirtualizer without adding an extra renderSlot Fragment layer. A
template-based wrapper would produce two nested Fragments, causing
ListboxVirtualizer's depth-1 VNode search to return undefined and crash.

## Props

| Name | Type | Required | Default | Description |
| --- | --- | --- | --- | --- |
| <span id="prop-options">options</span> | `array` | yes |  | List of items to render. |
| <span id="prop-estimateSize">estimateSize</span> | `number\|func` |  | `undefined` | Estimated size (in px) of each item. |
| <span id="prop-overscan">overscan</span> | `number` |  | `undefined` | Number of items rendered outside the visible area. |
| <span id="prop-textContent">textContent</span> | `func` |  | `undefined` | Text content for each item to achieve type-ahead feature. |

## Source

`client/lib/controls/combobox/ComboboxVirtualizer.vue`