Intersection Observer browser API in JavaScript

Intersection Observer is the amazing browser API using which we can implement

*Scroll Animation

* Infinite Scroll

*Lazy Loading and other excellent features.

Timeline :
00:00 Teaser
01:14 Intersection Observer ?
02:30 Intersection Observer Entry
04:14 Scroll Animation
08:08 unObserve method
09:26 rootMargin
10:33 Infinite Scrolling
17:00 Lazy Loading