svelte.config.js

import adapter from '@sveltejs/adapter-static';
import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
import preprocess from 'svelte-preprocess';
import { mdsvex, escapeSvelte } from 'mdsvex';
import { getHighlighter } from 'shiki';

import rehypeToc from 'rehype-toc';
import rehypeSlug from 'rehype-slug';

/** @type {import('mdsvex').MdsvexOptions}/ */
const mdsvexOptions = {
    extensions: ['.svx'],
    highlight: {
        highlighter: async (code, lang = 'text') => {
            const highlighter = await getHighlighter({
                themes: ['poimandres'],
                langs: ['javascript', 'typescript']
            });
            await highlighter.loadLanguage('javascript', 'typescript');
            const html = escapeSvelte(highlighter.codeToHtml(code, { lang, theme: 'poimandres' }));
            return `{@html \`${html}\` }`;
        }
    },
    rehypePlugins: [rehypeSlug, rehypeToc] // in order!
};

/** @type {import('@sveltejs/kit').Config} */
const config = {
    // Consult https://kit.svelte.dev/docs/integrations#preprocessors
    // for more information about preprocessors
    preprocess: [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()
    },
    paths: {
        // Change the first '' to your repository name if you are deploying a project site.
        base: process.env.NODE_ENV === 'production' ? '' : ''
    },
    extensions: ['.svelte', '.svx']
};

export default config;