Totally agree on VDOM, it's an implementation detail. I also agree that isomorphic is an intimidating and esoteric term. There are examples however, like the w

Totally agree on VDOM, it's an implementation detail. I also agree that isomorphic is an intimidating and esoteric term. There are examples however, like the word function, which are "overly psuedo-mathy" in exactly the same way. The mapping between rendering technologies is basically an isomorphism. Each category has objects (html OR dom) and a we can map them with the html parser (html => dom). Each category has morphisms (json => html OR json => dom) and we can map them between by loading the client modules ((json => html) => (json => dom)). Finally, for some json input (J), a renderer (R) and a function (F) that performs those mappings, the framework ensures that: F(R(J)) === F(R)(J). That's not exactly an isomorphism but it's VERY similar.