[webkit-dev] "ReflectOnly" IDL equivalent

Sam Weinig weinig at apple.com
Fri Jun 9 11:47:46 PDT 2017

> On Jun 2, 2017, at 11:32 AM, Ryosuke Niwa <rniwa at webkit.org> wrote:
> On Fri, Jun 2, 2017 at 9:18 AM, Chris Dumez <cdumez at apple.com> wrote:
>> Hi,
>> No, I do not believe WebKit supports ReflectOnly and this is not standard
>> IDL either.
>> The way to do it in WebKit would be to use a regular DOMString attribute, as
>> in the specification and implement this logic in the c++ getter for this
>> attribute. See HTMLElement::dir() for an example.
>> We could also consider adding support for something like ReflectOnly in our
>> bindings generator considering that this seems to be used quite a bit in the
>> HTML specification and it would decrease code complexity a little.
>> I’d actually be in favor of that.
> I'd suggest other names like "ReflectEnum" or even "Reflect<EnumType>"
> where EnumType is the name of enum that defines the list of values.
> "ReflectOnly" doesn't tell us on what "only" applies. If I didn't know
> the context, it sounds like something that does less work than regular
> "Reflect”.

I don’t see a good reason to complicate the bindings until this becomes more common place.  For now, I would just implement HTMLLinkElement::as() to behave as you want and leave the IDL unannotated, and we can revisit it at a later time.

- Sam

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