Watch mutations for accessibility issues.

a11y-observer.js

;(function (w, c) {
  var s, o = new MutationObserver(d(a), 1000)
  if (typeof axe === 'undefined') {
    s = w.createElement('script')
    s.src = 'https://cdnjs.cloudflare.com/ajax/libs/axe-core/3.0.2/axe.min.js'
    s.onload = function () {
      o.observe(w.body, c)
    }
    w.body.appendChild(s)
  } else {
    o.observe(w.body, c)
  }
  function a () {
    axe.run().then(function (r) {
      if (r.violations.length) {
        console.error('aXe')
        console.dir(r.violations)
      }
    })
  }
  function d (f, t) {
    var i
    return function () {
      clearTimeout(i)
      o.disconnect()
      i = setTimeout(f, t)
    }
  }
})(document, {
  attributes: !0,
  subtree: !0
})