0Pricing
HTML Academy · Lesson

Infinite Scroll Implementation

Load more content automatically as the user scrolls.

The Pattern

Infinite scroll loads more content as the user nears the bottom of the list. The cleanest implementation uses IntersectionObserver: place a "sentinel" element at the end of the list and observe it. When the sentinel enters the viewport, fetch the next page.

Sentinel Element

Append an invisible <div> (or a "loading..." placeholder) after the last list item. Observe it with IntersectionObserver. When it intersects, that signals the user has scrolled near the bottom — time to fetch more.

<ul id="feed">
  <li>Post 1</li>
  <li>Post 2</li>
</ul>
<div id="sentinel" aria-hidden="true"></div>

All lessons in this course

  1. IntersectionObserver API and Thresholds
  2. Lazy Loading with IntersectionObserver
  3. Infinite Scroll Implementation
  4. Scroll-Linked Animations Setup
← Back to HTML Academy