JSFiddle - React, Tailwind, and code Playground

HTML

<select id="s">
  <option value="a">a</option>
  <option value="b">b</option>
</select>

JavaScript

var s = document.getElementById('s');
s.onclick = function() {
  console.log('click');
}
s.onchange = function() {
  console.log('change');
}
s.onmousedown = function() {
  console.log('mousedown');
}
s.onmouseup = function() {
  console.log('mouseup');
}