config.js

const languages = {
  title: 'Language',
  type: 'dropdown',
  exact: true,
  items: [{ title: 'English', path: '/en/', matchPath: /\/en\/.*/i }]
}

const home = { title: 'Home', path: '/' }

const versions = [
  { title: 'Version 2.2', path: '/2.2/', matchPath: /^\/([a-z-]+)\/2.2\/.*/i },
  { title: 'Version 2.3', path: '/2.3/', matchPath: /^\/([a-z-]+)\/2.3\/.*/i }
]

function lang_version(lang) {
  const version = {
    title: 'Version',
    type: 'dropdown',
    exact: true
  }
  version.items = versions.map(function(v) {
    const ver = Object.assign({}, v)
    ver.path = '/' + lang + ver.path

    return ver
  })

  return version
}

docute.init({
  repo: 'vuejs/rollup-plugin-vue',
  'edit-link': 'https://github.com/vuejs/rollup-plugin-vue/edit/master/docs',

  nav: {
    default: [home, languages, lang_version('en')],
    'en2.3': [
      { title: 'Home', path: '/en/2.3/' },
      { title: 'Examples', path: '/en/2.3/examples' },
      languages,
      lang_version('en')
    ],
    'en2.2': [
      { title: 'Home', path: '/en/2.2/' },
      { title: 'Examples', path: '/en/2.2/examples' },
      languages,
      lang_version('en')
    ]
  },

  plugins: [
    docsearch({
      apiKey: '7792597613e997afeb0b75a206ca0c5a',
      indexName: 'rollup-plugin-vue',
      url: 'https://vuejs.github.io/rollup-plugin-vue'
    })
  ]
})