Re: [heycam/webidl] Disallow nullable Promise types. (#248)

> What's the reason to disallow nullable promise types? That said, they don't seem to be used, so this is probably OK...

I think the initial idea was that it would be a bad practice to have an attribute or operation not consistently return a promise.

That said, there's a number of functions that take a promise as argument, now, and I could imagine scenarios where it would make sense for these to be nullable.

So on second thought this seems like a good practice issue that maybe shouldn't be enforced by WebIDL.




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