Vue version

3.3.4

Link to minimal reproduction

https://play.vuejs.org/#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

Steps to reproduce

Now the return type of defineSlots is a all-required-key object, in this case, if (slots.default) looks like meaningless.

What is expected?

The keys of the return type of defineSlots are all optional

What is actually happening?

...

System Info

No response

Any additional comments?

No response

I think it's better to move to discussion