Get Notified when a DOM Element Enters or Exits

You can Get notified when a DOM element enters or exits the viewport with in-view.js. It’s a small (~1.9kb gzipped), dependency-free, javascript utility for IE9+. With in-view, you can register handlers that are called when an element enters or exits the viewport. Each handler receives one element, the one entering or exiting the viewport, as its only argument. As a small caveat, in-view utilizes MutationObserver to check the visibility of registered elements after a DOM mutation. If that’s functionality you need in IE9-10, consider using a polyfill.

Requirements: –
Demo: https://camwiegert.github.io/in-view/
License: MIT License