JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.13.1/css/bootstrap-select.css" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.bundle.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.13.1/js/bootstrap-select.min.js"></script>

<select class="selectpicker" multiple data-live-search="true">
  <option value="Mustard">Mustard</option>
  <option value="Ketchup">Ketchup</option>
  <option value="Relish">Relish</option>
</select>

JavaScript

$('select').selectpicker();

$("select").change(function(e) {
  if ($(this).is(':checked')) {
    console.log('hello!');
  }
});