How to make the calculator immediately open?

Question

JavaScript

How to make the calculator immediately open https://jsfiddle.net/x8m390c6/

Answer 1

In the version that you uploaded to jsfiddle.net, in my chrome, the button does not work at all. I'll tell you how to do it for the version that was on the Yandex disk.
1. In index.html we replace
on the
2. In style.css we replace

.box-price {
  background: #DDDDDD;
  color: #333;
  padding: 0 15px;
  overflow: hidden;
  height: 0px;
}

on the

.box-price {
  background: #DDDDDD;
  color: #333;
  padding: 0 15px;
  overflow: hidden;
  height: 390px;
}

3. In script.js remove this completely

$('.price-button').click(function() {
    var boxPrice = $(this).closest('.col-md-4');

    function hideButton () {
      $(boxPrice).find('.price-button').hide();
      $(boxPrice).find('.footer-price').append('<h4>Итог: <span class="cur"></span> <span class="rub">р. / м.кв.</span></h4>');

    };
    //анимация раскрытия блока с параметрами
    $(boxPrice).find('.box-price').animate({height: '390px'}, {'duration': 500}, {'easing': 'linear'}, hideButton());

  });

Done: https://jsfiddle.net/x8m390c6/2/