when writing a comment in a slot, the component can access the default slot internally.

[imddc]

when writing a comment in a slot, the component can access the default slot internally.

I think this is not an intuitive behavior, maybe the compiler can optimize this behavior?

[edison1105]

This is because the playground preserve the comment nodes by default.

[imddc]

okay
I tried it in the development environment and the production environment.
development:

production:

they are indeed different, this problem has been bothering me for a day, and I still think it's a point that can be improved.

[edison1105]

Comments are always preserved during development.
see https://vuejs.org/api/application.html#app-config-compileroptions-comments

Here are helper functions to check slot is empty. #4733