This component allows client-side manipulation of elements with different stack levels.
This component is similar to the cf2:ui.box component, however, it dependents on the mcs:style.Positioning feature that is not necessary for most usages of cf2:ui.box. Please refer to the topic entitled Overlays for more information about the z-index property and the mcs:style.Positioning feature.
This component is provided by the ui:overlay element. It can contain arbitrary markup.
This component is a common UI component and implements the methods defined in Common JavaScript methods.