I should have been more specific: I was speaking of SSR working and being interactive without JavaScript, based upon my interpretation of the significance of jiofih’s comment. Hence also my reference to my other comment, which goes into more technically precise detail (concerning the shadow DOM not being serialisable, hence JavaScript being required to make any faking of that work again). I used the word “prerendering” because the parent comment did, but I should have been more careful with my terminology, because I didn’t quite mean that.