Re: Custom Elements: insert/remove callbacks

On Thu, May 7, 2015 at 10:44 PM, Anne van Kesteren <annevk@annevk.nl> wrote:

> On Fri, May 8, 2015 at 7:42 AM, Elliott Sprehn <esprehn@chromium.org>
> wrote:
> > That actually seems pretty similar to what we have, ours is in the form
> of:
> >
> > Node#insertedInto(Node insertionPoint)
> > Node#removedFrom(Node insertionPoint)
> >
> > where insertionPoint is the ancestor in the tree where a connection was
> > added or removed which may be arbitrarily far up the ancestor chain. From
> > that you can figure out all the cases Boris is describing.
>
> Cool. So maybe the DOM specification needs to be updated to have that
> model and we should expose that as low-level hook to web developers.
>

We'd consider adding a new MutationObserver type, we'd prefer not to add
any more tree mutation callbacks. Anything you can do with those you can do
with an ancestorChanged record type and takeRecords().

- E