[css-properties-values-api] Allowing a default invalid initialValue when syntax is not "*"

[jyc]

Right now, we allow a default invalid initial value when syntax is omitted or is "*" (discussed in #286). While writing testcases/demos for the Servo implementation, I actually expected the same to apply when the syntax was specified to be something other than "*", because I normally only used typed custom properties on specific elements, e.g. for animation and felt kind of icky giving an initial value to everything on the page, and also because unregistered custom properties work that way.

Tab pointed out some problems, in particular, that the value you'd get back for the computed value might not always be an actual value of that type anyomre (it'd be null or ""), and that it would most likely be an authoring error.

Overall, though, it seems to me like it would be more natural and more similar to unregistered custom properties to allow a default invalid initial value for all syntaxes.

[css-meeting-bot]

The Working Group just discussed Allowing a default invalid initialValue when syntax is not "*", and agreed to the following resolutions:

• RESOLVED: Reject as no change.

The full IRC log of that discussion

<nainar> Topic: Allowing a default invalid initialValue when syntax is not "*"
<nainar> GitHub: https://github.com//issues/453
<nainar> TabAtkins: Syntx of custom props is *. This allows default invalid value too.
<nainar> TabAtkins: Servo iplementor expected default invalid value to be allowed too. But I think no, you should declted an initial value
<nainar> TabAtkins: I dont see why we should allow a bottom value to all properties like this.
<nainar> TabAtkins: Proposal reject as no change?
<nainar> astearns: if yu had alot of registere props of a particulat type. Make sure initial value is in every declaration.
<nainar> TabAtkins: This is already required.
<nainar> iank_: It's trivial to do this
<nainar> RESOLVED: Reject as no change.
<TabAtkins> ScribeNick: TabAtkins

[nainar]

Closing this issue as a WontFix as per the Resolution