JSFiddle - React, Tailwind, and code Playground

by Sean Wessell

HTML

<form>


  <select required>
  <option></option>
  <option>1</option>
  <option>2</option>
  </select>
  <button>
    submit
  </button>

</form>

JavaScript

$('button').addClass("disabled");
$('form').change(function() {
    var n = $("input:invalid").length;
    if (n === 0) {
      $('button').removeClass("disabled");
    } else if (n > 0){
      $('button').addClass("disabled");
    }
    console.log(n);
});