Bookmarklet to generate TOC foro github wiki on cursor point in text area

gh-md-toc-gen.js

javascript: (() => {
    const e = document.querySelector('#gollum-editor-body');
    const re = /^(#+)\s*(.+)$/;
    const beginToc = '<!-- BEGIN TOC -->';
    const endToc = '<!-- END TOC -->';

    const lists = e.textContent.split("\n").filter(line => re.test(line)).map((line) => {
        const m = line.match(re);
        const tag = m[1].replace(/#$/, '*').replace(/#/g, '  ');
        const desc = m[2];
        return `${tag} [${desc}](#${desc.replace(/\s/g, '-')})`;
    });
    const toc = beginToc + "\n" + lists.join("\n") + "\n" + endToc + "\n";
    e.focus();
    document.execCommand('insertText', false, toc);
})();