I appreciate your responses, but I think we got off track somehow. I&#x27;m quite familiar with the general architecture of SPA&#x27;s... my question is specifically about how this library implements this feature. I didn&#x27;t see anything in the docs about how to use URI or HTTP headers (or anything else) to specify which fragments you want -- instead it just says &quot;?spf=navigate will be appended to the url&quot;. So I was wondering how this library specifically thinks more fine-grained details about what to return should be communicated to the server.