code: function render(event) {
      var tooltip = document.createElement('div')
        , element = $(event.element)
        , pos = element.get('data-placement')
        , offset = this.offset(event.element)
        , placement;
  
      //
      // Create the tooltip with the proper content and insert.
      //
      tooltip.id = "tooltip";
      tooltip.innerHTML = element.get('data-content');
      tooltip.className = ['animated', 'tooltip', 'fadeIn', pos].concat(
        element.get('data-color')
      ).filter(Boolean).join(' ');
  
      document.body.appendChild(tooltip);
  
      //
      // Update the position of the tooltip.
      //
      placement = this.placement(pos, tooltip, event.element);
      tooltip.setAttribute('style', [
        'left:' + (offset.left + placement.left) + 'px',
        'top:' + (offset.top + placement.top) + 'px'
      ].join(';'));
    }
docs: Render the tooltip.
  
  @param {Event} event
  @api private