astro.config.mjs

import mdx from "@astrojs/mdx";
import vercel from "@astrojs/vercel";
import { defineConfig } from "astro/config";
import rehypeAutolinkHeadings from "rehype-autolink-headings";
import rehypePrettyCode from "rehype-pretty-code";
import rehypeSlug from "rehype-slug";
import remarkGfm from "remark-gfm";

export default defineConfig({
  output: "server",
  adapter: vercel({
    webAnalytics: {
      enabled: true,
    },
    speedInsights: {
      enabled: true,
    },
  }),
  integrations: [mdx()],
  markdown: {
    remarkPlugins: [remarkGfm],
    rehypePlugins: [
      rehypeSlug,
      [
        rehypePrettyCode,
        {
          theme: "dracula",
          onVisitLine(node) {
            if (node.children.length === 0) {
              node.children = [{ type: "text", value: " " }];
            }
          },
          onVisitHighlightedLine(node) {
            node.properties.className.push("line--highlighted");
          },
          onVisitHighlightedWord(node) {
            node.properties.className = ["word--highlighted"];
          },
        },
      ],
      [
        rehypeAutolinkHeadings,
        {
          properties: {
            className: ["subheading-anchor"],
            ariaLabel: "Link to section",
          },
        },
      ],
    ],
  },
});