code: function rectCheck (element) {
              element = element || this._element;
  
              if (this.selector && !(isElement(element))) {
                  element = this._context.querySelector(this.selector);
              }
  
              return getElementRect(element);
          }
docs: /*\
  Interactable.getRect
  [ method ]
  
  The default function to get an Interactables bounding rect. Can be
  overridden using @Interactable.rectChecker.
  
  - element (Element) #optional The element to measure.
  = (object) The object's bounding rectangle.
  o {
  o     top   : 0,
  o     left  : 0,
  o     bottom: 0,
  o     right : 0,
  o     width : 0,
  o     height: 0
  o }
  \