Streaming rendering for fre SSR
<Suspense fallback={<div>Loading...</div>}>
<div>Actual Content</div>
</Suspense>
<template name="$1">
<!--$?-->
<div>Loading...</div>
<!--/$-->
</template>
<template name="$2">
<div>Actual Content</div>
<template>
<script>
replace($1, $2);
</script>