Bootstrap 4 jQuery UI Datepicker

jQuery UI Datepicker demo for BS4

HTML

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/css/font-awesome.css">
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/jquery-ui.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.js"></script>
<div class="container">
  <form>
    <div class="form-group">
      <label for="myDate">Date</label>
      <div class="input-group">
        <input id="myDate" name="myDate" type="text" class="form-control" />
        <div class="input-group-append" style="cursor: pointer;" onclick="$('#myDate').focus();">
          <span class="input-group-text">
            <i class="fa fa-calendar"></i>
          </span>
        </div>
      </div>
    </div>
  </form>
</div>

CSS

/* Based on: https://gist.github.com/miwahall/7028640 */

.ui-datepicker {
  background-color: #fff;
  border: 1px solid #66AFE9;
  border-radius: 4px;
  box-shadow: 0 0 8px rgba(102, 175, 233, .6);
  display: none;
  margin-top: 4px;
  padding: 10px;
  width: 240px;
}

.ui-datepicker a,
.ui-datepicker a:hover {
  text-decoration: none;
}

.ui-datepicker a:hover,
.ui-datepicker td:hover a {
  color: #2A6496;
  -webkit-transition: color 0.1s ease-in-out;
  -moz-transition: color 0.1s ease-in-out;
  -o-transition: color 0.1s ease-in-out;
  transition: color 0.1s ease-in-out;
}

.ui-datepicker .ui-datepicker-header {
  margin-bottom: 4px;
  text-align: center;
}

.ui-datepicker .ui-datepicker-title {
  font-weight: 700;
}

.ui-datepicker .ui-datepicker-prev,
.ui-datepicker .ui-datepicker-next {
  cursor: pointer;
  font-family: 'Glyphicons Halflings';
  -webkit-font-smoothing: antialiased;
  font-style: normal;
  font-weight: normal;
  height: 20px;
  line-height: 1;
  margin-top: 2px;
  width: 30px;
}

.ui-datepicker .ui-datepicker-prev {
  float: left;
  text-align: left;
}

.ui-datepicker .ui-datepicker-next {
  float: right;
  text-align: right;
}

.ui-datepicker .ui-icon {
  display: none;
}

.ui-datepicker .ui-datepicker-calendar {
  table-layout: fixed;
  width: 100%;
}

.ui-datepicker .ui-datepicker-calendar th,
.ui-datepicker .ui-datepicker-calendar td {
  text-align: center;
  padding: 4px 0;
}

.ui-datepicker .ui-datepicker-calendar td {
  border-radius: 4px;
  -webkit-transition: background-color 0.1s ease-in-out, color 0.1s ease-in-out;
  -moz-transition: background-color 0.1s ease-in-out, color 0.1s ease-in-out;
  -o-transition: background-color 0.1s ease-in-out, color 0.1s ease-in-out;
  transition: background-color 0.1s ease-in-out, color 0.1s ease-in-out;
}

.ui-datepicker .ui-datepicker-calendar td:hover {
  background-color: #eee;
  cursor: pointer;
}

.ui-datepicker .ui-datepicker-calendar td a {
  text-decoration: none;
}

.ui-datepicker...

JavaScript

$("#myDate").datepicker({
  dateFormat: "yy-mm-dd",
  maxDate: 0
});