svelte/test/runtime/samples/await-then-catch-in-slot/main.html

<Foo>
	{{#await thePromise}}
		<p>loading...</p>
	{{then theValue}}
		<p>the value is {{theValue}}</p>
	{{catch theError}}
		<p>oh no! {{theError.message}}</p>
	{{/await}}
</Foo>

<script>
	import Foo from './Foo.html';

	export default {
		components: { Foo }
	};
</script>