JSFiddle - React, Tailwind, and code Playground

HTML

<select id="mySelect">
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="mercedes">Mercedes</option>
  <option value="audi">Audi</option>
</select>
<table id="myTable">
    <tr id="tr-1">
        <td id="td-1"></td>
    </tr>
</table>
<input id="mybutt" type="button" value="Click Me">

JavaScript

/* jQuery
$('#mybutt').click(function() {
    var selcar = $('#mySelect').val();
    $('#td-1').html(selcar);
});
*/

document.getElementById('mybutt').onclick = function() {
    var selcar = document.getElementById('mySelect').value;
    //alert(selcar);
    document.getElementById('td-1').innerHTML = selcar;
};