insane options for use with marked and highlightjs

insaneOptions.js

const insaneOptions = {
  allowedAttributes: {
    a: ['href', 'name', 'target', 'rel', 'title'],
    img: ['src', 'alt', 'title'],
    input: ['type', 'checked', 'disabled'],
    code: ['class'],
    span: ['class'],
    th: ['align'],
    tr: ['align']
  },
  allowedClasses: {
  },
  allowedSchemes: ['http', 'https', 'mailto'],
  allowedTags: [
    'a', 'article', 'b', 'blockquote', 'br', 'caption', 'code', 'del', 'details', 'div',
    'em', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'img', 'input', 'ins', 'kbd',
    'label', 'li', 'main', 'ol', 'p', 'pre', 'section', 'span', 'strike', 'strong', 'sub',
    'summary', 'sup', 'table', 'tbody', 'td', 'th', 'thead', 'tr', 'u', 'ul'
  ],
  filter: node => {
    [
      [ 'code', 'language-' ],
      [ 'span', 'hljs-' ]
    ].forEach(([ tag, prefix ]) => {
      if (
        node.tag === tag
        && typeof node.attrs.class === 'string'
        && (/\s/.test(node.attrs.class) || !node.attrs.class.startsWith(prefix))
      ) {
        delete node.attrs.class;
      }
    });

    return true;
  },
  transformText: null
};

for (let i = 1; i <= 6; i++) {
  insaneOptions.allowedAttributes[`h${i}`] = ['id'];
}