Introduction Learning Points 📖 Understanding of Intersection Observer API Acquire the way to use Intersection Observer API through out making infinite scroll Body Backdrop of use Let's say that you are fetching data with hundres images from the server. If you are trying to show all images to the clients at once, it will provide a terrible user experience due to network overload. Then, your precious clients will leave the page in 3secs. That's why you need to consider **Laz