Anne, maybe you could write on the wiki what the current Web Components implementation in Chrome is using. That would make it a bit easier to follow for people who didn't follow all of the discussion so far.
Kenneth On Thu Jan 15 2015 at 5:05:35 PM Anne van Kesteren <ann...@annevk.nl> wrote: > On Wed, Jan 14, 2015 at 9:52 PM, Dimitri Glazkov <dglaz...@google.com> > wrote: > > FWIW, I think that element upgrade is sort of fundamental to the > usefulness > > of custom elements. In a world where most scripts are non-blocking > (that's > > hopefully the modern world we should aim for), I'll effectively expect to > > walk the tree anyway. > > > > And if I walk the tree anyway, what's the point of custom elements in the > > first place? One of the key features (at least, to me) of custom elements > > was being able to harness the HTML Parser to instantiate your object > tree. > > If that's not going happen consistently, then I am not sure custom > elements > > are worth the trouble. IOW, if you're walking the tree, just do the work > of > > callbacks as you encounter dash-separated elements. > > My rationale is this: > > * Unlike you I think lifecycle callbacks are the main selling point of > a custom element. They give you access to hooks that normal elements > have but are not otherwise exposed. > * I think we could iterate towards a v2 that has an aspect of > upgrading but perhaps works a bit differently from the current setup. > E.g. a way to include an entire subtree of custom elements with a > fallback mechanism of sorts. Or perhaps something inspired by > JavaScript modules. > * Upgrading can be added, but moving from Brain transplants to a more > normal working constructor would be impossible after the fact. > > Now, given the discussion so far, it does seem that synchronous or > almost-synchronous constructors have a number of hard issues and it's > not entirely clear to me anymore those are worth pushing over Brain > transplant or Dummy replacement, using the terminology from: > > https://wiki.whatwg.org/wiki/CustomElements#Upgrading > > > -- > https://annevankesteren.nl/ > >
