JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdn.jsdelivr.net/webjars/org.webjars.bower/materialize/0.97.5/dist/js/materialize.min.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/webjars/org.webjars.bower/materialize/0.97.5/dist/css/materialize.min.css">
<script src="https://cdn.jsdelivr.net/webjars/org.webjars.bower/jquery-validation/1.15.0/dist/jquery.validate.min.js"></script>
<script src="https://cdn.jsdelivr.net/webjars/org.webjars.bower/moment/2.11.2/min/moment.min.js"></script>
<script src="https://cdn.jsdelivr.net/webjars/org.webjars.bower/materialize/0.97.5/dist/font/material-design-icons/Material-Design-Icons.woff2"></script>
<script src="https://cdn.jsdelivr.net/webjars/org.webjars.bower/materialize/0.97.5/dist/font/material-design-icons/Material-Design-Icons.woff"></script>
<div class="row">


<div class="col s4">
  <input type="text" class="datepicker" />
</div>
</div>

JavaScript

(function($) {

  $.fn.calendar = function(options) {

    // Options du datepicker
    var settings = $.extend({
        editable: true,
        format: 'dd/mm/yyyy',
        formatSubmit: 'ddmmyyyy'
      },
      options
    );

    this.pickadate(settings);
    var picker = this.pickadate('picker');

    this.change(function(event) {
      if (moment($(this).val(), "DD/MM/YYYY", true).isValid()) {
      	alert('set the date...');
        // ??? picker.set('select', $(this.val());
      }
    })

    var $triggerIcon = $('<div class="col s2 center-align"><a class="btn-floating btn-large waves-effect waves-light trigger-datepicker">Date</a></div>');
    $triggerIcon.click(function(event) {
      event.stopPropagation();
      event.preventDefault();
      picker.open();
    });
    this.parent().after($triggerIcon);
    // Resolves picker opening for thing
    this.next().unbind("focus.toOpen");
    return this;
  };
}(jQuery));


$('.datepicker').calendar();
$('#formulaireDate').validate();