> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes.

# previewUrl$

> Observable of the preview image URL.

```ts
get previewUrl$(): Observable<string | undefined>
```

Observable of the preview image URL.

## previewUrl

```ts
get previewUrl(): string | undefined
```

Preview image URL.

## **Examples**

```ts
address.previewUrl$.subscribe((previewUrl) => {
  console.log('previewUrl:', previewUrl);
});
```

> Observable of the preview image URL.