const marked = require('jstransformer')(require('jstransformer-marked'));

marked.render('# Hello World!').body
//=> '<h1>Hello World!</h1>'

const markedOptions = {}
marked.render('# "Hello World"', markedOptions)

// also supports async walkTokens
marked.renderAsync('# Hello World', {
  walkTokens: async (token) => {
    const uriPrefix  = await uriPrefixAsync()
    if (token.href) {
      token.href = uriPrefix + token.href
    }
  }
})