> ## Documentation Index
> Fetch the complete documentation index at: https://velt.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Feb 27 2024

## Versions

* Latest SDK: [1.0.87](https://www.npmjs.com/package/@veltdev/react)
* Latest Types: [1.0.103](https://www.npmjs.com/package/@veltdev/types)

## Comment Thread Component

We've abstacted out the UI we use for the threads in our `Comments`component into its own component. Now you can use our [Comment Thread](/async-collaboration/comment-thread/overview) component with your comment data to create your own custom UIs.

<Frame>
  <iframe src="https://landing-page-demo-velt.vercel.app/?feature=comment-thread" allow="camera; microphone" scrolling="no" frameBorder="0" className="w-full" height="700px" />
</Frame>

[Open in larger window](https://landing-page-demo-velt.vercel.app/?feature=comment-thread)

## Update Contact List

The [Contact List](/key-concepts/overview#users) is the list of emails you see when you try to `@mention` one of your teammates in a comment thread.

We now have two ways for you to keep your users' contact lists up to date.

* [Server Side](/api-reference/rest-apis/v2/users/delete-users): Implement updates to your contact lists directly through a server-side API call. This method ensures that your contact lists are always synchronized with the latest data.
* [Client Side](/key-concepts/overview#users): For more dynamic updates, the client-side `identify()` method can be re-called with a configuration object to reinitialize your logged in users' contact list.

## PDF Viewer Support

We've added support for you to [leave comments on PDF Viewers](/async-collaboration/comments/customize-behavior/general-controls). To enable this, simply add the `data-velt-pdf-viewer` attribute on the element containing your PDF.

```jsx theme={null}
<!-- Add data-velt-pdf-viewer="true" attribute at container level of your pdf viewer -->
<div id="viewerContainer" data-velt-pdf-viewer="true">
    <!-- Your pdf viewer here -->
    <div id="viewer" class="pdfViewer"></div>
</div>
```