Snabbdom patches over given container

While I’ve been writing my intergration for snabbdom with Cycle.js, I’ve come to notice that running for example patch(document.querySelector('.app'), view), snabbdom is actually patching over .app. However my needs are for the view to be appended to .app, because I need to listen to events relative to .app. Is there a way to do this currently or is it possible to add support for this? I’d be happy to submit a PR if it is needed and would be accepted.

Thank you for your time.

[leeoniya]

@paldepind if you split the vtree-build/diff and DOM-hydration stages, it becomes trivial to hydrate the vtree from a server-built DOM without any diffing (assuming it was built from the identical vtree). in domvm, the entire loop is a few recursive lines: https://github.com/leeoniya/domvm/blob/master/src/view.js#L309-L318

[paldepind]

@avesus In principle you can do that. That is what virtual-dom does. But diffing just a real DOM tree against a virtual one is not as fast as diffing two virtual trees against each other. Thus that is what Snabbdom does. In your case it would have been nice if Snabbdom could patch DOM against VDOM. But it would be a lot of extra code. I think the workaround is acceptable. You only have to do it once.