JSFiddle - React, Tailwind, and code Playground

HTML

<select id="mySelect">
  <option value="1">One</option>
  <option value="2">Two</option>
  <option value="3">Three</option>
</select>

<input type="button" id="btn" value="Show" />

JavaScript

var find = function() {
  alert($('#mySelect').find(":selected").text());
}

$('#btn').click(function() {
  find();
})