code: function createIcons ($container, $data) {
              var $sites = getSites($data);
  
              $data.mode == 'prepend' ? $sites.reverse() : $sites
  
              if (!$sites.length) {return;}
  
              $.each($sites, function (i, $name) {
                  var $url  = makeUrl($name, $data);
                  var $link = $data.initialized ? $container.find('.icon-'+$name) : $('<a class="social-share-icon icon-'+$name+'"></a>');
  
                  if (!$link.length) {
                      return true;
                  }
                  $link.prop('aria-label', "分享到 "+$ariaLabels[$name]);
  
                  $link.prop('href', $url);
  
                  if ($name === 'wechat') {
                      $link.prop('tabindex', -1);
                  } else {
                      $link.prop('target', '_blank');
                  }
  
                  if (!$data.initialized) {
                      $data.mode == 'prepend' ? $container.prepend($link) : $container.append($link);
                  }
              });
          }
docs: Create site icons
  
  @param {Object|String} $container
  @param {Object}        $data