JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-timepicker/1.10.0/jquery.timepicker.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jquery-timepicker/1.10.0/jquery.timepicker.min.css">
<input class="pickuptime_end" id="pickuptime_end" name="pickuptime_end" placeholder="Time" size="10" type="text" value="10 pm" style="display: inline-block;">

JavaScript

$('.pickuptime_end').timepicker({
	  interval: 30,
    disableTextInput: true
	});
  
  $("input.pickuptime_start, input.pickuptime_end, input.deliverytime_start, input.deliverytime_end").change( function() {
  alert("changed")
})