This prototype needs JavaScript

If you can read this message, the app you opened this file in is showing a static preview and is not running the interactive parts (calculators, forms, navigation). This is common in email previews, iPhone/iPad "Files" or Quick Look previews, and chat attachment previews.

To test it: save the file, then open it in a full web browser. On a computer, double-click it or drag it into Safari, Chrome, Edge, or Firefox. On an iPhone, use "Open in" Safari, or email it to a computer.