sample: jQuery UI datepicker and $.append text to <textarea>

by sii_side

HTML

<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"></script>
<link rel="stylesheet" href="https://code.jquery.com/ui/1.12.1/themes/black-tie/jquery-ui.css">
<input type="hidden" id="hidden_input" class="datepicker" />
<textarea class="form-control" rows="3" id="date_list" required></textarea>

JavaScript

$(function() {
  $("#hidden_input").datepicker({
    showOn: "button",
    buttonText: "カレンダーで選択",
    onSelect: function() {
      $(this).data('datepicker').inline = true;
      $('#date_list').val($('#date_list').val() + $(this).val() + '\n');
    },
    onClose: function() {
      $(this).data('datepicker').inline = false;
    }
  });
});