How to use the @webcreate/infinite-ajax-scroll function in @webcreate/infinite-ajax-scroll

let offset = pageIndex * limit;

  for (let i = offset, len = offset + limit; i < len; i++) {
    let block = frag.appendChild(document.createElement('div'));

    block.id = 'block' + (i + 1);
    block.classList.add('blocks__block');
    block.innerHTML = i + 1;
  }

  return this.append(Array.from(frag.childNodes))
      // indicate that there is a next page to load
      .then(() => true);
};

window.ias = new InfiniteAjaxScroll('.blocks', {
  item: '.blocks__block',
  next: nextHandler,
  spinner: '.loader'
});

import InfiniteAjaxScroll from '@webcreate/infinite-ajax-scroll';

window.ias = new InfiniteAjaxScroll('.surface-container', {
  item: '.article',
  next: '.pager__next',
  pagination: '.pager',
  spinner: '.loader'
});

ias.on('last', function() {
  let el = document.querySelector('.no-more');

  el.style.opacity = '1';
});

// update title and url then scrolling through pages
ias.on('page', (e) => {
  document.title = e.title;