2020-12-23 UTC
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[KevinMarks] That's looking at it slightly obliquely - if you don't start with a client side framework, this is a way to do partial updates more easily, by sending html fragments. What DHH has in the new version is some web component based syntax to declare the frames, and integration of service workers for caching of the partials. The basic ide aof html over the wire is old though http://www.kevinmarks.com/staticjah.html