code: function createParser(_options, _extraPlugins) {
    // default options
    var options
    if (typeof _options === 'undefined') {
      options = {}
    } else {
      options = _options
    }
  
    // default extra plugins
    var extraPlugins
    if (typeof _extraPlugins === 'undefined') {
      extraPlugins = []
    } else {
      extraPlugins = _extraPlugins
    }
  
    // type validations
    if (typeof options !== 'object') {
      throw new TypeError('The markdown parser options must be an object.')
    }
  
    if (!Array.isArray(extraPlugins)) {
      throw new TypeError('The parser extra plugins must be an array.')
    }
  
    // Initialize the MD parser and apply plugins
    const parser = new MarkdownIt(
      Object.assign(
        {
          html: false,
          breaks: true,
          linkify: true,
          xhtmlOut: true,
          typographer: true,
          langPrefix: 'language-',
        },
        options
      )
    )
  
    parser.use(emoji)
    // parser.use(checkbox);
    parser.use(linkAttributes, {
      attrs: {
        target: '_blank',
        rel: 'nofollow noopener',
      }
    })
    parser.use(implicitFigures)
    parser.use(mark)
    parser.use(ins)
    parser.use(abbr)
    parser.use(deflist)
    parser.use(video, options.video || {})
    // parser.use(podcast, options.podcast || {})
  
    function applyPlugin(extraPlugin) {
      if (Array.isArray(extraPlugin)) {
        const plugin = extraPlugin[0]
        const config = extraPlugin[1]
        return parser.use(plugin, config || {})
      }
      parser.use(extraPlugin)
    }
  
    // apply extra plugins
    extraPlugins.forEach(applyPlugin)
  
    function parse(html) {
      return parser.render(html)
    }
  
    return parse;
  }
docs: const podcast = require('markdown-it-podcast')