JSFiddle - React, Tailwind, and code Playground

HTML

<select id="cities" name="cities" onchange="getLoca()">
    <option value="0">--City--     </option>
<option value="1">City1</option>
<option value="2">City2</option>
<option value="3">City3</option>
<option value="4">City4</option>
<option value="5">City5</option>
</select>;                   
<select id="loca" name="loca" style="width: 170px" ></select>
<script type="text/javascript">
function getLoca() {
    alert("yes");
}
</script>