JSFiddle - React, Tailwind, and code Playground

by Gabriel Rodrigues

HTML

<select id="s_um" name="s_um">
  <option id="um_1" value="0"> 0 </option>
  <option id="um_2" value="1"> 1 </option>
  <option id="um_3" value="2"> 2 </option>
  <option id="um_4" value="3"> 3 </option>
</select>

<select id="s_dois" name="s_dois">
  <option id="dois_1" value="0"> 0 </option>
  <option id="dois_2" value="1"> 1 </option>
  <option id="dois_3" value="2"> 2 </option>
  <option id="dois_4" value="3"> 3 </option>
</select>

JavaScript

document.querySelector('select').addEventListener('change', function() {
  console.log(this.value);
});