svelte.config.js

/**
 * @typedef {import('hast').ElementContent} ElementContent
 */

import adapter from '@sveltejs/adapter-auto';
import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';

import { escapeSvelte, mdsvex } from 'mdsvex';
import shiki from 'shiki';

import { fromHtmlIsomorphic } from 'hast-util-from-html-isomorphic';

import rehypeAutolinkHeadings from 'rehype-autolink-headings';
import rehypeSlug from 'rehype-slug';

/** @type {import('mdsvex').MdsvexOptions} */
const mdsvexOptions = {
	extensions: ['.md', '.svx'],
	rehypePlugins: [
		rehypeSlug,
		[
			rehypeAutolinkHeadings,
			{
				behavior: 'prepend',
				content:
					/** @type {Array<ElementContent>} */
					(
						fromHtmlIsomorphic(
							// '<svg class="header-content" xmlns="http://www.w3.org/2000/svg" height="full" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-hash"><line x1="4" x2="20" y1="9" y2="9"/><line x1="4" x2="20" y1="15" y2="15"/><line x1="10" x2="8" y1="3" y2="21"/><line x1="16" x2="14" y1="3" y2="21"/></svg>',
							'<p class="header-content">#</p>',
							{ fragment: true }
						).children
					)
			}
		]
	],
	highlight: {
		highlighter: async (code, lang = 'text') => {
			const highlighter = await shiki.getHighlighter({ themes: { dark: 'poimandres' } });
			const html = escapeSvelte(highlighter.codeToHtml(code, { lang }));
			return `{@html \`${html}\` }`;
		}
	}
};

/** @type {import('@sveltejs/kit').Config} */
const config = {
	// Consult https://kit.svelte.dev/docs/integrations#preprocessors
	// for more information about preprocessors
	extensions: ['.svelte', '.md'],
	preprocess: [vitePreprocess(), mdsvex(mdsvexOptions)],

	kit: {
		// adapter-auto only supports some environments, see https://kit.svelte.dev/docs/adapter-auto for a list.
		// If your environment is not supported or you settled on a specific environment, switch out the adapter.
		// See https://kit.svelte.dev/docs/adapters for more information about adapters.
		adapter: adapter()
	}
};

export default config;