jQuery UI Position

Positions elements relative to other elements.


Calculate the position of an element relative to another element or event. It has also functionality to handle collision within the viewport of a given container. It does not manipulate CSS or DOM, it only calculates values. It is a basic technology to support implementation of tooltips, popups, popovers, scrollspies, sticky navi and many more.

Near Viewport

jQuery selector to find elements near the viewport.


A jQuery plugin to watch when elements scroll into view.


A jQuery plugin to react when elements scroll into view.

Center In

jQuery plugin to center an element within another element with fine control over orientation and offset.