JSFiddle - React, Tailwind, and code Playground

HTML

<dd>
  <select id="product_attribute_5_1_13" name="product_attribute_5_1_13">
    <option value="39">Black</option>
    <option value="37">White</option>
  </select>
</dd>

<dd>
  <select id="product_attribute_5_2_14" name="product_attribute_5_2_14" class="valid">
    <option value="38">1 test</option>
    <option value="39" selected="selected">2 Test</option>
  </select>
</dd>
<p id="ddValue"></p>

JavaScript

$('p').text($('#product_attribute_5_1_13').eq(0).val());