README.md

This will log the currently active element as it changes. Really great for accessibility testing when you're trying to figure out what element has focus (so you can either prevent it from getting focus or make the fact that it has focus more visually obvious for example).

activeElementLogger bookmarklet

javascript:(function(){if(window._activeElInterval){clearInterval(window._activeElInterval);delete window._activeElInterval;}else{var activeEl;window._activeElInterval=setInterval(function(){var currentActiveEl=document.activeElement;if(currentActiveEl!==activeEl){activeEl=currentActiveEl;console.log(activeEl);}},200);}})();

formatted-activeElementLogger.js

(function() {
  if (window._activeElInterval) {
    clearInterval(window._activeElInterval);
    delete window._activeElInterval;
  } else {
    var activeEl;
    window._activeElInterval = setInterval(function() {
      var currentActiveEl = document.activeElement;
      if (currentActiveEl !== activeEl) {
        activeEl = currentActiveEl;
        console.log(activeEl);
      }
    }, 200);
  }
})();