Wow, this is great, unlocks lots of freedom. I was under the impression that this was not possible, maybe through web components or <slot>.

As a side note, I’ve been going through all the HTML elements slowly to learn the fundamentals, and it turns out that lots of elements are just a <div> or <span>, with different default styles and default ARIA things.

And a <div> is just a <span> with display block…

This and TFA both help me to realize HTML is pretty darn simple.