In the sample code, there is no "streaming" going on -- the server simply uses the client code as a template to generate HTML and sends it as a normal HTTP response. In pseudocode:

    import "client.js" as client
    on request:
      document = new ServerDOM(),
      client.render(document, data),
      respond with document.toHtmlString()

> I don't understand why it isn't "true" SSR This article seems to be using the term SSR exclusively in the frontend framework sense, where client code is run on the server. It's not how I use the term but it is a common usage.

Another possible reason that the htmx approach isn't discussed: the any-server-you-want nature of htmx is terrible for selling Deno Deploy :]