JSFiddle - React, Tailwind, and code Playground

HTML

<select id="dropdownId">
    <option>Option A</option>
    <option>Option B</option>
</select>

<select id="dropdownId2">
    <option>Option 1</option>
    <option>Option 2</option>
</select>

JavaScript

var setLastSelected = function(element) {
   $(element).data('lastSelected', $(element).find("option:selected"));
};
        
$("select").each(function () {
   setLastSelected(this);
});

$("select").change(function(){        
      if(confirm("Are you sure")) { 
          setLastSelected(this);
          return true; 
      }
      else {
         $(this).data('lastSelected').attr("selected", true);
         return false;
      }
});