code: function _disableInteraction() {
      var disableInteractionLayer = document.querySelector('.introjs-disableInteraction');
  
      if (disableInteractionLayer === null) {
          disableInteractionLayer = document.createElement('div');
          disableInteractionLayer.className = 'introjs-disableInteraction';
          this._targetElement.appendChild(disableInteractionLayer);
      }
  
      _setHelperLayerPosition.call(this, disableInteractionLayer);
  }
docs: Add disableinteraction layer and adjust the size and position of the layer
  
  @api private
  @method _disableInteraction