shouldLoadMore.js

 function shouldLoadMore(component, node, offset) {
   if (typeof component.needsMoreItems === 'function' && component.needsMoreItems()) {
     return true;
   } else if (node) {
     const rect = node.getBoundingClientRect();
     const innerHeight = window.innerHeight;
     return rect.top + rect.height > innerHeight && innerHeight > rect.bottom - offset;
   }
   return false;
 }