[css-view-transitions-2] view-transition-name: auto when matching id should namespace

[vmpstr]

We have a view-transition-name: auto that can use the id attribute from the element as the view transition name. (https://www.w3.org/TR/css-view-transitions-2/#auto-vt-name)

I think it can be confusing if, for example, in the old state we match id=foo and on the other side that pairs with css view-transition-name: foo.

The proposal is to "namespace" id matching. Basically id=foo would only match with id=foo and not with view-transition-name: foo. Or, in other words, names generated by the id attribute can only match elements that have names that are also generated by the id attribute.

@nt1m @noamr fyi

[nt1m]

I think this makes sense

[noamr]

I'm personally happy to resolve on this, perhaps asynchronously since WG meeting time is hard to get.

/cc @jakearchibald
I think this is less footgunny than the previous auto and is perhaps satisfactory.

[jakearchibald]

I still think this is a bad feature with a bad name. But it was force-shipped.

[flackr]

Is this name exposed to the developer or does it just look like the transition is named auto?

If it's exposed, what is the name it's exposed as?

[noamr]

Is this name exposed to the developer or does it just look like the transition is named auto?

If it's exposed, what is the name it's exposed as?

It should not be exposed, as per previous resolutions it would be match-element, but it can also be auto