Create slot inside md

How to create slot in md? something like this:

```
<template>
<MDC :value="md"  tag="article" >

<SomeDynamicContent  v-if=data/>

<LoginForm v-else @submit="onLogin" />

</MDC>
</template>

<script setup lang="ts">
const md = `

Hello MDC

::slot
::

Footer
`

const {data} = await useAsyncData(async ()=>{ return 123})

function onLogin(event) {
// do login
}

</script>
```