svem/dist/plugins/heading.js

Svelte in Markdown preprocessor

import { visit } from "unist-util-visit";
const remarkHeadingLink = (options) => {
  return (tree, file) => {
    const headings = [];
    visit(tree, "heading", (node) => {
      if (options.depths.includes(node.depth)) {
        const text = node.children.map((n) => {
          return n.value;
        }).join("");
        const slug = slugify(text, options);
        headings.push({ text, slug, level: node.depth });
        node.data = node.data || {};
        node.data.hProperties = { id: slug };
      }
    });
    file.data.headings = headings;
  };
};
function slugify(text, options) {
  const words = text.match(/\w+/g);
  let slug = (words ?? []).join("-");
  if (options?.lower ?? true) {
    slug = slug.toLowerCase();
  }
  return slug;
}
export {
  remarkHeadingLink,
  slugify
};