src/plugins/matomo.js

function appendScript(options) {
  const script = document.createElement('script')
  script.async = true
  script.src = options.host + '/matomo.js'
  document.body.appendChild(script)
}

function init(options) {
  window._paq = window._paq || []
  window._paq.push(['trackPageView'])
  window._paq.push(['enableLinkTracking'])
  setTimeout(function() {
    appendScript(options)
    window._paq.push(['setTrackerUrl', options.host + '/matomo.php'])
    window._paq.push(['setSiteId', options.id + ''])
  }, 0)
}

function collect() {
  if (!window._paq) {
    init($docsify.matomo)
  }
  window._paq.push(['setCustomUrl',  window.location.hash.substr(1)])
  window._paq.push(['setDocumentTitle', document.title])
  window._paq.push(['trackPageView'])
}

const install = function (hook) {
  if (!$docsify.matomo) {
    console.error('[Docsify] matomo is required.')
    return
  }

  hook.beforeEach(collect)
}

$docsify.plugins = [].concat(install, $docsify.plugins)