@dcasia/react-lazy-load-image-component-improved/src/utils/intersection-observer.js

React Component to lazy load images using a HOC to track window scroll position.

export default function() {
	return (
		typeof window !== 'undefined' &&
		'IntersectionObserver' in window &&
		'isIntersecting' in window.IntersectionObserverEntry.prototype
	);
}