code: function alex(value, config) {
    var allow
  
    if (Array.isArray(config)) {
      allow = config
    } else if (config) {
      allow = config.allow
    }
  
    return core(
      value,
      unified()
        .use(markdown)
        .use(frontmatter, ['yaml', 'toml'])
        .use(remark2retext, makeText(config))
        .use(filter, {allow: allow})
    )
  }
docs: Alex.