> For the complete documentation index, see [llms.txt](https://docs.appetize.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.appetize.io/deprecated.md).

# Deprecated

- [Cross-document messages](https://docs.appetize.io/deprecated/cross-document-messages.md): Interact with the virtual device via a Javascript post-message API