JSFiddle - React, Tailwind, and code Playground
by Academia
HTML
<table>
<tbody id="mapping_table">
<tr>
<td>Some Value 1</td>
<td>
<select name="xml_field[some_value_1]">
<option value="1">Select value 1</option>
<option value="2">Select value 2</option>
</select>
</td>
<td>
<select name="join_field[some_value_1]">
<option value="1">Join select value 1</option>
<option value="2" selected>Join select value 2</option>
</select>
</td>
</tr>
</tbody>
</table>
JavaScript
$("#mapping_table tr").each(function () {
var firstSelect = $(this).find('td:nth-child(2) select').val();
var secondSelect = $(this).find('td:nth-child(3) select').val();
alert(firstSelect);
alert(secondSelect);
});