JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.12.3/jquery.min.js"></script>
<form name="myform" id="myForm">
  <select id="dropdown1">
    <OPTION VALUE="mushrooms">mushrooms</OPTION>
    <OPTION VALUE="greenpeppers">green peppers</OPTION>
    <OPTION VALUE="onions">onions</OPTION>
    <OPTION VALUE="tomatoes">tomatoes</OPTION>
    <OPTION VALUE="olives">olives Read more at
    </OPTION>
  </select>
  <div id="listbox" ></div>
  <br>
</form>

JavaScript

$('#dropdown1').change(function() {
  data = ["hi","there","How","Are","You"];
  var check="";
  $.each(data, function(index,ListName){
  	check += ' ' + ListName;
  });
  alert(check);
});