TGViewer
Front End World Front End World @front_end_first · 25.9K subscribers
Post #6902 1.04K
The Intersection Observer API

An in-depth tutorial on the Intersection Observer API: entries, thresholds, rootMargin, lazy loading, infinite scroll, scrollspy, visibility tracking, and the pitfalls to avoid.

https://flaviocopes.com/intersection-observer/
  • ❤ 1
Open in Telegram All posts from @front_end_first
More from @front_end_first
  1. Oct 12, 2026You Don’t Know Bidi (And Neither Does ChatGPT) https://blog.master.dev/you-dont-know-bidi-…
  2. Oct 12, 2026How CSS content-visibility Works and How It Can Improve Rendering Performance What happens…
  3. Oct 11, 2026Styling the Native <select> with appearance: base-select CSS can finally style a real sele…
  4. Oct 10, 2026Optimizing objects with null prototypes I dug into why { __proto__: null } traps objects i…
  5. Oct 9, 2026New HTML and CSS features you should be using in your design system Declan Chidlow explore…
  6. Oct 9, 20267 Useful JavaScript Features Added in ECMAScript 2026 Explore seven practical ECMAScript 2…
Threads Profile ViewerView any public Threads profile without an account.Open ThreadLook →Writing with AI? Make it sound human.Metric37 rewrites AI drafts so they read naturally. Free AI detector, 1,500 words free.Try Metric37 →