Make ObservableArray "subclassable"

[tabatkins]

Make ObservableArray "subclassable"

[tabatkins]

Hm, that said, we've (purposely, I believe) moved away from ObservableArrays being constructable objects; instead they're just JS arrays with a proxy wrapped around them. Preserving that quality might be worthwhile, in which case a more focused syntax that just specifies extra operations on the proxy might be better? Like:

ObservableArray<CSSRule> CSSRuleList {
  CSSRule? item(int index);
};

Then you could use CSSRuleList as a type and it's just an ObservableArray with an extra method implemented in the proxy.

[bathos]

Would the handlers implement the methods/attributes with own-property semantics? (perhaps achieved literally in terms of regular own-properties of the [[ProxyTarget]] — there’d be nothing special to do, so traps delegating to OrdinaryWhatever would be enough.)

[tabatkins]

I'm not sure, and don't think I particularly care about the details. Whichever is simpler and makes more sense works for me.