var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver;

  var list = document.querySelector('ol');

  var observer = new MutationObserver(function(mutations) {  

    mutations.forEach(function(mutation) {

      if (mutation.type === 'childList') {

        var list_values = [].slice.call(list.children)

            .map( function(node) { return node.innerHTML; })

            .filter( function(s) {

              if (s === '<br>') {

                return false;

              }

              else {

                return true;

              }

         });

        console.log(list_values);

      }

    });

  });

  observer.observe(list, {

    attributes: true, 

    childList: true, 

    characterData: true

  });