thebuilder/react-intersection-observer
React Intersection Observer
react-intersection-observer is a React implementation of the Intersection Observer API designed to track when DOM elements enter or leave the browser viewport. It provides a wrapper and a set of hooks for monitoring element visibility and triggering callbacks when content becomes visible to the user.
The library includes a mechanism for DOM occlusion detection to determine if an element is covered by other components or hidden by CSS filters. It also features a polyfill wrapper that provides visibility fallbacks for browsers that do not natively support intersection observer capabilities.
The project covers various visibility tracking capabilities, including state-synced updates for component re-renders and non-rendering monitoring to execute callbacks without updating state. These tools support the implementation of infinite scrolling, lazy loading of assets, and scroll-based animations.
