@vivliostyle/vfm/lib/plugins/toc.js

Custom Markdown syntax specialized in book authoring.

import shortcodes from 'remark-shortcodes';
import { remove } from 'unist-util-remove';
const keepToC = () => (tree) => {
    remove(tree, { cascade: false }, (node) => {
        return node.type === 'shortcode' && node.identifier !== 'toc';
    });
};
export const mdast = {
    plugins: [[shortcodes, { startBlock: '[[', endBlock: ']]' }], keepToC],
};