JSFiddle - React, Tailwind, and code Playground

HTML

<input class="custom_datepicker optional custom_datepicker_selector" data-date-format="dd/mm/yyyy" id="client_order_order_date" name="client_order[order_date]" size="30" type="text" value="2013-02-17">

JavaScript

$('.custom_datepicker_selector').datepicker({
weekStart: 1
})
.on('changeDate', function(en) {
  var correct_format;
  correct_format = en.date.getFullYear() + '-' + ('0' + (en.date.getMonth() + 1)).slice(-2) + '-' + ('0' + en.date.getDate()).slice(-2);
  $('.custom_datepicker_selector').datepicker('hide');
  return $(this).parent().find("input[type=hidden]").val(correct_format);
});