# About the Demo This documentation site contains the JupyterLite Demo (the **Try** buttons on the top of the screen) and uses a number of techniques described on this page. ## Demo Configuration The following generated configuration powers the Demo, and is generated prior to building the docs site, copied in during the build, and fetched by browsers from `/_static/jupyter-lite.json`. ```{literalinclude} ../../build/docs-app/jupyter-lite.json :language: json ``` ## Demo Extension Notes The `federated_extensions` above are copied from the documentation environment prior to building this site with [Sphinx](../howto/deployment/sphinx.md), and are meant to exercise different kinds of extensions, including themes, MIME renderers, Widgets, and an shared document provider for [RTC](../howto/configure/rtc.md). The demo disables autodetection of environment extensions with `ignore_sys_prefix`, as the outer development environment includes a number of extensions with features that don't work.