sapper-template/routes/blog/[slug].html

<svelte:head>
	<title>{post.title}</title>
</svelte:head>

<h1>{post.title}</h1>

<div class='content'>
	{@html post.html}
</div>

<style>
	/*
		By default, CSS is locally scoped to the component,
		and any unused styles are dead-code-eliminated.
		In this page, Svelte can't know which elements are
		going to appear inside the {{{post.html}}} block,
		so we have to use the :global(...) modifier to target
		all elements inside .content
	*/
	.content :global(h2) {
		font-size: 1.4em;
		font-weight: 500;
	}

	.content :global(pre) {
		background-color: #f9f9f9;
		box-shadow: inset 1px 1px 5px rgba(0,0,0,0.05);
		padding: 0.5em;
		border-radius: 2px;
		overflow-x: auto;
	}

	.content :global(pre) :global(code) {
		background-color: transparent;
		padding: 0;
	}

	.content :global(ul) {
		line-height: 1.5;
	}

	.content :global(li) {
		margin: 0 0 0.5em 0;
	}
</style>

<script>
	export default {
		preload({ params, query }) {
			// the `slug` parameter is available because this file
			// is called [slug].html
			const { slug } = params;

			return this.fetch(`blog/${slug}.json`).then(r => r.json()).then(post => {
				return { post };
			});
		}
	};
</script>