How to take full page screenshot using this library?

[codesherpa-xs]

Steps To Reproduce

Hi,

Thanks for building this. I currently use html2canvas for one of my projects, where I need to take a screenshot of the whole page.

When I use your example, I am only able to take screenshot of visible page. Would really appreciate if you can help document how to take a full page screenshot.

Thanks!

Playground for https://codesandbox.io

Playground for https://codepen.io

Playground for https://play.vuejs.org

Error Message & Stack Trace

```txt ```

Your Environment

• modern-screenshot: [e.g. 4.4.9]
• Browser: [e.g. chrome 111.0.5563.64]