[Decode]

<span data-title="bla-bla">1</span>
<span data-title="bla-bla">2</span>
<span data-title="bla-bla">3</span>
  
<script>
  var elems = document.querySelectorAll('*[data-title]');
  
  for (var i = 0; i < elems.length; i++) {
    alert( elems[i].innerHTML );
  }
</script>