I have to get item name when I click on stack. You can see my chart from below link. In that there are two stacks "matched" and "unmatched", if I click on any one of the stack I have to get that stack name.
http://jsfiddle.net/aa6ja2nx/1/
This is not currently possible in FacetChart (it is in TimeChart). We will add additional event arguments to expose the currently hovered series as well.
But when we hover on stacked bars, in info panel you are highlighting the hover item. Can you tell me that how you are able to that , so from that i will tried to find out solution.
Internally the information is available. If you want to retrieve it, you can do it by reading chart._impl.scene.hoverSeriesItem. Note that this accesses an internal member so it is not officially supported approach and might stop working on any upgrade.
chart._impl.scene.hoverSeriesItem
Version 1.13.2 added hoverSeries to the event arguments object.
hoverSeries