---
title: "Viewer prefetched content (3.x)"
description: "Clover 3.x (@samvera/clover-iiif), the earlier version, documented for reference."
url: https://clover.iiif.library.northwestern.edu/docs/3.x/viewer/prefetched
version: "3.x, the earlier version, superseded by Clover 4"
---

> This page documents **Clover 3.x**, `@samvera/clover-iiif`, the earlier version of Clover, kept here for reference. These docs lead with Clover 4: [Get started](https://clover.iiif.library.northwestern.edu/docs).

## Viewer (Prefetched Content)

[Docs →](https://clover.iiif.library.northwestern.edu/docs/3.x/viewer)

IIIF Manifest or Collection

IIIF Manifest or Collection

A UI component that renders a multicanvas IIIF item viewer with pan-zoom support for `Image` via [OpenSeadragon](https://openseadragon.github.io/) and `Video` and `Sound` content resources using the [HTML video element](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video).

---

> **Example**: a live example on the page, showing sample IIIF data. What it shows is demonstration content, not about Clover; its code, where the page gives it, follows.