jquery-appear-original
It implements a custom 'appear'/'disappear' events which are fired when an element became visible/invisible in the browser view port.
dom-track
Fluent utility to track DOM elements as they appear, change, or get removed — using both callback and Promise-based APIs.
jquery-appear-poetic
It implements a custom 'appear'/'disappear' events which are fired when an element became visible/invisible in the browser view port.
react-lifecycle-appear
A React HOC, adding lifecycle methods for handling a component enters or exits the viewport.
