How to check if date is selected or not in multidatespicker?

Question

Node.js

I work with the calendar using the multidatespicker plugin, I need to display the user who selected it when hovering over the selected date.
So far it's implemented like this, but it only displays the name for the last selected date..

<div id="inputPassword2"></div>
<script type="text/javascript">
  $( document ).tooltip();
  $('#inputPassword2').multiDatesPicker({     
  });
  $("html").on("mouseenter",".ui-state-active", function() {
    $(this).attr('title', 'константин');
  });
</script>

I ask for help, for the third day I have been squirming with this js and multidatespicker.