2011/9/7 Mark S. Miller <[email protected]> > On Wed, Sep 7, 2011 at 7:10 AM, Tom Van Cutsem <[email protected]> wrote: > >> 2011/9/7 David Bruant <[email protected]> >> >>> ** >>> Emulating the DOM, probably. It would still be possible to have >>> non-extensible trapping proxies, but not turn the proxy into a native DOM >>> Document/Node/Element/HTMLElement/DocumentFragment, etc... This could create >>> some bad performance penalty for DOM Traversers [1] for instance (or >>> querySelectorAll). Would it even be possible to have an "hybrid" DOM tree >>> with native DOM Node and emulated DOM Node? >>> >> >> So a sealed/frozen DOM element requires no more interposition at all? >> > > I don't understand the question or how you got there. >
I asked earlier "I don't know whether there is a use case that requires [proxies "becoming" host objects when fixed]." To which David replied emulating the DOM. I found that odd, since a proxy that "becomes" a DOM node loses the ability to interpose as well. Hence my question asking whether DOM elements can do without interposition when fixed. Judging from the rest of the conversation, I think David and I misunderstood. David, correct me if I'm wrong, but what I now think you meant is that proxies should at least be able to fake the [[Class]] of a DOM node, not necessarily that a proxy should "become" a plain DOM object and lose its ability to trap. > Certainly, for security purposes, sealed/frozen DOM nodes still carry > tremendous authority, and so we still need to interpose proxy-wrappers for > them. > That's what I thought. Cheers, Tom
_______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
