code: function() {
              // Since window has its own native 'resize' event, return false so that
              // jQuery will bind the event using DOM methods. Since only 'window'
              // objects have a .setTimeout method, this should be a sufficient test.
              // Unless, of course, we're throttling the 'resize' event for window.
              if(!jq_resize[str_throttle] && this[str_setTimeout]) {
                  return false;
              }
  
              var elem = $(this);
  
              // Add this element to the list of internal elements to monitor.
              elems = elems.add(elem);
  
              // Initialize data store on the element.
              $.data(this, str_data, {
                  w: elem.width(),
                  h: elem.height()
              });
  
              // If this is the first element added, start the polling loop.
              if(elems.length === 1) {
                  loopy();
              }
          }
docs: Called only when the first 'resize' event callback is bound per element.