jQuery lower right corner rotating ring menu special effect code_javascript skills

jquery implements the special effect code of the rotating ring menu in the lower right corner, which is fixed at the lower right corner of the page. When the user clicks the main menu button, the submenu items will rotate into the page in a ring, and use animate.css to create animation effects.
The rendering is as follows:

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html code:

<div class="htmleaf-container">
 <div id='ss_menu'>
  <div>
  <i class="fa fa-qq"></i>
  </div>
  <div>
  <i class="fa fa-weibo"></i>
  </div>
  <div>
  <i class="fa fa-weixin"></i>
  </div>
  <div>
  <i class="fa fa-renren"></i>
  </div>
  <div class='menu'>
  <div class='share' id='ss_toggle' data-rot=''>
   <div class='circle'></div>
   <div class='bar'></div>
  </div>
  </div>
 </div>
</div>

js code:

$(document).ready(function (ev) {
 var toggle = $('#ss_toggle');
 var menu = $('#ss_menu');
 var rot;
 $('#ss_toggle').on('click', function (ev) {
  rot = parseInt($(this).data('rot')) - 180;
  menu.css('transform', 'rotate(' + rot + 'deg)');
  menu.css('webkitTransform', 'rotate(' + rot + 'deg)');
  if (rot / 180 % 2 == 0) {
   toggle.parent().addClass('ss_active');
   toggle.addClass('close');
  } else {
   toggle.parent().removeClass('ss_active');
   toggle.removeClass('close');
  }
  $(this).data('rot', rot);
 });
 menu.on('transitionend webkitTransitionEnd oTransitionEnd', function () {
  if (rot / 180 % 2 == 0) {
   $('#ss_menu div i').addClass('ss_animate');
  } else {
   $('#ss_menu div i').removeClass('ss_animate');
  }
 });
});