On Sat, Dec 7, 2013 at 6:56 PM, Ryosuke Niwa <rn...@apple.com> wrote:
> > > On Dec 7, 2013, at 3:53 PM, Rafael Weinstein <rafa...@google.com> wrote: > > > > The issue is that being an element and having shadow DOM -- or any > display DOM, for that matter -- are orthogonal concerns. > > > > There are lots of c++ HTML elements that have no display DOM. Polymer > already has an even larger number. > > While that's true in browser implementations, there is very little authors > can do with a plain element without any shadow content it since JavaScript > can't implement it's own style model (i.e. creating a custom frame object > in Gecko / render object in WebKit/Blink) or paint code in JavaScript. > > If the only customization author has to do is adding some CSS, then we > don't need custom element hook at all. > > I'm was thinking about elements whose purpose isn't presentational. For example, <link> or <script> in html, or <polymer-ajax> in polymer. > It's true that mutation observers wouldn't run immediately after innerHTML > if authors wanted to add some JS properties but we could fix that issue in > some other way; e.g. by delivering mutation records every time we run a > parser. > > - R. Niwa >