Scope

if

What do you want to define?

mizu should probably treats <template> as a group block, similarly to how v-if handles it

<template *if="true">
  <p></p>
  <p></p>
</template>

Since *else and *empty relies internally on *if, this behaviour would be shared between all of these directives.

Side note: using <template style="display: contents"> unfortunately doesn't work

Interaction with *else may be harder, we need to keep track of "appeared" elements

I have searched for existing issues

Yes