Re: [heycam/webidl] Clarifications to dictionary semantics (#859)

@domenic commented on this pull request.



> +Dictionaries are always passed by value: the dictionary does not retain a reference to its
+language-specific representation (e.g., the corresponding ECMAScript object). So for example,

I'm not sure what you mean by "will not be observable directly outside of it", except for the idea that when the dictionary is converted to ES, it will not have such a link. So they seem like the same before and after the colon to me.

That said, I'd be happy to just remove "Dictionaries are always passed by value". "Pass by value" is a notoriously confusing concept and it might be better to just explicitly state what we mean, as the parts after the colon try to do.

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