datetimepicker not working with bootstrap 4?

Answer 1

After change datetimepicker CDN it is working as expected.

Hope this will help you.

$(function() {
  $('#datetimepicker1').datetimepicker();
});

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/tempusdominus-bootstrap-4/5.0.1/js/tempusdominus-bootstrap-4.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/tempusdominus-bootstrap-4/5.0.1/css/tempusdominus-bootstrap-4.min.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.11.2/js/all.js" integrity="sha256-2JRzNxMJiS0aHOJjG+liqsEOuBb6++9cY4dSOyiijX4=" crossorigin="anonymous"></script>

<div class="container">
  <div class="row">
    <div class="col-sm-6">
      <div class="form-group">
        <div class="input-group date" id="datetimepicker1" data-target-input="nearest">
          <input type="text" class="form-control datetimepicker-input" data-target="#datetimepicker1" />
          <div class="input-group-append" data-target="#datetimepicker1" data-toggle="datetimepicker">
            <div class="input-group-text"><i class="fa fa-calendar"></i></div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>

To localize the datetimepicker Need to add locale CDN after moment.min.js Like the below example.

You can find locale CDN URLs from Here -> https://cdnjs.com/libraries/moment.js

$(function() {
  $('#datetimepicker1').datetimepicker();
});

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/locale/fa.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/tempusdominus-bootstrap-4/5.0.1/js/tempusdominus-bootstrap-4.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/tempusdominus-bootstrap-4/5.0.1/css/tempusdominus-bootstrap-4.min.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.11.2/js/all.js" integrity="sha256-2JRzNxMJiS0aHOJjG+liqsEOuBb6++9cY4dSOyiijX4=" crossorigin="anonymous"></script>

<div class="container">
  <div class="row">
    <div class="col-sm-6">
      <div class="form-group">
        <div class="input-group date" id="datetimepicker1" data-target-input="nearest">
          <input type="text" class="form-control datetimepicker-input" data-target="#datetimepicker1" />
          <div class="input-group-append" data-target="#datetimepicker1" data-toggle="datetimepicker">
            <div class="input-group-text"><i class="fa fa-calendar"></i></div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>