JSFiddle - React, Tailwind, and code Playground

HTML

<div class="views-exposed-form">
  <select>
    <option value="0">0</option>
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
  </select>
  <select>
    <option value="0">0</option>
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
  </select>
  <select>
    <option value="0">0</option>
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
  </select>
  <select>
    <option value="0">0</option>
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
  </select>
  <select>
    <option value="0">0</option>
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
  </select>
</div>

JavaScript

$(function() {
  $('.views-exposed-form select').change(function() {
    $(this).addClass('selected');
  })
})