> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/web/get-started/guides/samples/annotation.md). # Annotation code samples in JavaScript Discover how to manage users and permissions, annotate HTML web pages, and enable real-time collaboration using Node.js and Firebase backends. Learn about custom annotations in this comprehensive guid ## Users and permissions Describes types of permissions and switching between users. You can also show/hide annotations of specific users. Launch demo View source code ## Annotate HTML web pages In this example, you are able to pass any URL and be able to save a copy of that website to annotate. View source code on Github ## Realtime collaboration - Node.js An example setup with Node.js backend. View source code on Github ## Realtime collaboration - Firebase An example setup with Firebase backend. For more details, refer to [realtime collaboration guide](/web/collaboration/realtime-collaboration.md). Launch demo View source code ## Custom annotations Shows how to create and add custom annotations by extending the existing annotation classes. Launch demo View source code --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.apryse.com/web/get-started/guides/samples/annotation.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.